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Partially redeeming a Casascius physical bitcoin - help request

Overview of problem
I have a Casascius physical bitcoin and I am unable to add its digital contents to a wallet. It seems that the key is not the right length or format. I started to get out of my depth with talk of things like a Minikey format.
I removed the hologram when I was given it years ago as I was curious what was under there. I don't want to sell it instead I want to add its 1 BTC value to a wallet so I can partially redeem it and keep the physical brass as a collectible.
What I have observed and tried (apologies in advance for butchering terms)
I've searched several sites, including here and haven't been able to find a current answer for the new style of keys and wallets.
I put the seven character code from the hologram into the casascius.uberbills dot com site and it gives me a 33 character key, tells me it's version 2 and confirms that it has a 1 BTC value
I've tried to import it into a Blockchain wallet but get the error "this private key does not match the watch only address above" when I enter the private key under the hologram. For some reason it seems like a different public address is generated when I enter the 33 char code.
I tried to import it into a Jaxx Liberty wallet but it doesn't recognise the minikey or 33 char code as valid.
I've basically run up against my level of knowledge and don't know what the next steps are of if I'm missing something bleeding obvious. I double and triple checked any data entry because I saw this was a common problem.
I'd really appreciate any help or pointers the community can give me.
Thanks
Edit:
Solution
I followed the advice given by u/murbul in reply to my post
You might struggle to find a wallet that natively supports MINI keys these days since it's an old format that never really took off apart from Casascius coins. So your best bet is to use a tool to convert it to a real private key (starting with 5) and import/sweep that into a wallet.
You can convert it on the Wallet Details tab of https://www.bitaddress.org/ - For 1 BTC I'd be paranoid enough to recommend downloading the source and doing everything offline: https://github.com/pointbiz/bitaddress.org
I used the site and one of the keys generated was one starting with '5' (Private Key WIF). I used this in Jaxx Liberty in the 'Paper Wallet Import' function under tools and it came right across.
I’m very happy.
submitted by PickledNumbat to Bitcoin [link] [comments]

Finally got one

Finally got one submitted by Scooby303 to Bitcoin [link] [comments]

Basic Bitcoin security guide

Hello,
This post is to give you a quick introduction into Bitcoin security. While nobody can guarantee you 100% security, I hope to mitigate some problems you can run into. This is the “20% of effort to get you to 80% safe”.
First of all, you have to determine how much money you want to hold in Bitcoin and how much effort are you willing to put in. If you are happy just holding a few dollars worth and don’t care if you lose them, that’s one approach to take. For everyone else, lets get started.
Password strength
A lot of the times how secure your money is will be determined by the strength of your password. Since in the worst case scenario we are talking about someone trying to brute force your wallet, casual online passwords are too weak. Under 10 characters is too weak. Common words and phrases are too weak. Adding one number to a password at the end is too weak.
Moreover, you can consider your password much weaker if you:
If you want a really strong password:
Wallet security
Now we are getting to the meat of things.
There are a number of wallets available to store your hard earned bitcoins. If you have a decent amount of coins to store, you should look into software wallets - BitcoinQT, MultiBit, Armory or Electrum. They are among the best place to store your money safely (provided your computer is secure as well). Chose one you think best suits you, install it and encrypt your wallet file with your strong password. You should take your wallet file and back it up (location of the file is different for different clients, so you have to do some research as to where to find that file). Back it up on a CD, safe USB drive or the like. Keep them safe. If you lose that file, you will lose your money.
A quick word on deterministic wallets. Electrum and Armory allow you to create wallets from a seed. If you use the same seed later, you can recreate your wallet on other machines. With deterministic wallets, you only need to keep that seed secure to have access to your money.
In comparison, in BitcoinQT's traditional wallet, every address you use is random, meaning that after you send 50-100 outgoing transactions your backups can be obsolete. Always keep an up-to-date backup of such wallet file if possible.
Okay, sometimes you need to have your Bitcoins with you when you leave your computer. In this case, you should look into either online or mobile wallets. A staple for both of those is Blockchain.info, but there are others to chose from.
A good rule of thumb with these is to not store more money in them than you can afford to lose. They are best used as a convenient way of accessing some money, not storing your savings. Online wallets are especially vulnerable to their servers getting hacked and people’s money getting stolen.
What to keep in mind while using online wallets:
  • Use a secure password (the more money you have in them the stronger the password should be)
  • Always keep a backup of your wallet in case you need to recover your money
  • Whenever possible, enable two factor authentication
  • Don’t use your online wallets from unsafe computers
Cold storage
Sometimes you want to store your bitcoins for a long time in a safe place. This is called “cold storage”. There are a few ways one can do this.
First of all, paper wallets. They are nice for giving people small bitcoin gifts, but also for long-term storage if properly used. What you want to do is generate and print them offline. You can save the linked page for example and run that offline. If you are really paranoid, you can put it on read-only media and access that from a different computer. For really long term storage, use archival-grade paper.
Another approach to take is using a separate computer for storing your money that is offline 99+% of the time. You could set one up easily by buying an old laptop, reformatting it, installing Linux and a Bitcoin client. Generate an address on that machine and send money to it from your main wallet. Depending on how paranoid you are you can connect that computer to the Internet afterwards to synchronize data with the Bitcoin Network and then turn it off and put it away somewhere safe until it’s needed.
Brain wallets
Don’t. They are not for you. Unless you are a security-conscientious programmer, those are not for you.
Diversifying
Keeping all of your eggs in one basket is never a good thing. You should look into diversifying some of your Bitcoin assets in case your other storage methods fail. Some ways you can diversify:
  • Buy a physical Bitcoin. As long as you trust the coin creator such coins can be an effective cold storage
  • Invest - I wouldn’t recommend this for more than some trivial amount unless you know what you are doing, but investing in some Bitcoin stocks could be a way to get more money out of your bitcoins
How not to diversify:
  • Avoid keeping your bitcoins at exchanges or other online sites that are not your online wallets. Such sites can be closed down or disappear along with your money.
  • Alt-coins - there are few cryptocurrencies that are worthwhile, but most of them are just Bitcoin clones. If a currency brings nothing new, it’s worthless in comparison to Bitcoin. Namecoin is a distributed domain name server (although recently it had a fatal flaw uncovered, so be warned), Ripple is a distributed currency exchange and payment system. Litecoin will only be useful in case Bitcoin’s hashing algorithm gets compromised (very unlikely at this time). Beyond that there are few if any alt-coins that are a worthwhile way of diversifying.
Accepting payments and safety
We’ve covered safe ways to store money, now a quick note about bitcoin payments and their safety.
First of all, when you are sending a transaction, pay your fees. Transactions without fees can take forever to propagate, confirm and clear. This can cause you a lot of stress, so pay your fees.
Secondly, when accepting large Bitcoin payments (say you want to suddenly cash in a gold bar into bitcoins), wait for at the very least 1 confirmation on those transactions. 6 is best, but having even 1 confirmations is a lot better than having none. This is mainly a rule of thumb for the paranoid (I wouldn’t be doing this for most casual transaction), but maybe it will save you if you are dealing with some shady people.
Wrapping up...
That should cover the basics. If you want to read more about Bitcoin’s security in general, here is my master thesis on the subject. A lot of questions about Bitcoin and security have also been answered on Bitcoin StackExchange - be sure to check it out.
Comments and improvement suggestions welcome.
EDITS:
  • Removed link to insecure site
  • Removed random article section
  • Added information about deterministic wallets
submitted by ThePiachu to Bitcoin [link] [comments]

Hi Departments of Financial Services, Here is the proposed Virtual Currency Regulator Application

In developing this regulatory framework, we have sought to strike an appropriate balance that helps protect individuals, consumers, businesses, services, and innovators, while rooting out unscrupulous and over-reaching regulatory activity. These regulations include provisions to help safeguard customer assets, protect against unwarranted account freezes or seizures, and prevent the regulatory abuse of virtual currencies from unethical activity, such as widespread warrantless monitoring, disclosure of private information, dictation as to how users engaged in P2P or non-fiat transfers can spend their money, and scapegoating.
We recognize that not everyone in the regulatory community will be pleased about the prospect of what could be seen as a barrier to their regulatory authority. Ultimately, though, we believe that setting up common sense rules of the road is vital to the long-term future of the virtual currency industry, as well as the safety and soundness of customer assets. (We think the situation in New York, for example, made that very clear.) Moreover, given that P2P decentralized networks are stateless, headless, community consensus driven bodies, we also have a moral obligation to move forward on this framework.
Entities are considered "interested in regulating virtual currencies" if:
... in a manner that would affect any current or prospective member of the human race.
Entities "interested in regulating virtual currencies" must:
As the first decentralized community to put forward specially tailored rules for virtual currency regulators – continued public feedback will be an important part of finalizing this regulatory framework. We look forward to carefully and thoughtfully reviewing public comments on our proposal.
submitted by Try_AgainNY to Bitcoin [link] [comments]

Bitcoin Cash and Casascius Coins

So I have a question. Casascius coins are phisical bitcoins with a holgram / sealed into the back of them. They are really nice objects available in several denominations and you can discover the bitcoin deposit address for these coins. They may or may not be available new right now (I think not) so far as I know all or most were issued before 1/82017 the fork date.
Now I can send BTC to the deposit deposit address for any coin and check it with the block explorer, And I can also check the BCH balance, which given that these coins have their holograms in tact, have 1 BCH and 1BTC on them. More if I have sent additional BTC funds. In my view these are lovely objects, like a piggy bank, that can be broken apart at a time of need and spent by the owner. Now I can still send BTC to these addresses, but so far as I am aware replay protection would prevent me sending BCH. Is this true? It would seem a terrible shame, and if you believe that BCH will be the one true Bitcoin, we need a way to do this.
Any thoughts or suggestions?
Of course the same question could be asked about Bitcoin Gold. Personally I dont much rate the chances of Bitcoin Gold, but that aside, can I send BTG to an old BTC address such as a Casascius with a good expectation that I would be able to recover it in the future by sweeping with a BTG wallet?
submitted by mintymark to btc [link] [comments]

Selling some Physical Bitcoins & other cryptos! Fair Prices!

Verification and More Pictures
Pictures of Lealana Brass, I forgot to add some to the main album
Hey guys, I have a huge collection of physical Bitcoins & other physical cryptos, and I'm selling a few extras just to be able to buy 1 or more coins still on my "Wish List." I love all coins in general, but these are my favorite to collect followed by old world silver coinage & Norfed Liberty Dollars. I haven't sold much on Reddit yet, but I have a 100% positive feedback eBay account and also a lot of positive trust feedback on Bitcointalk.org.
eBay Account and BitcoinTalk profile (click on "trust" to see feedback)
Added some brief information about the coins in italics
For Sale:
MicroSoul's original coins were minted in the UK. Low mintage, but not sure off the top of my head what the numbers were. They released a couple series and some in .999 fine silver.
These coins came from Crypto Imperator in Spain. They have released these 10,000 Dogecoins made of brass- total mintage of 500, and did a limited run of only 25 coins in .999 fine silver containing it's face value of 100,000 Dogecoins, and are currently working on a run of only 10 .999 fine gold 1,000,000 Dogecoins. There are 5 left of 10, check here for more info. They also made 1 physical Bitcoin, all are very finely made beautiful coins. CI's coins are in no way related to the Silver bullion Dogecoin coins you may have seen.
bhcoins come from a pair in Argentina. They have released 4 different series in the past few years. These coins are from Series 3 and a mintage of only 200, with the first 20 reserved by the creators.
Cryptolator is based in Canada but minted at the esteemed Northwest Territorial Mint in Washington state. Their only design so far was the Unchained Series, minted in .999 fine silver, copper, Merlin Gold, antique copper, and antique brass. These copper coins listed are from a limited mintage of 500. The the coin is minted with proof-like quality and features the "Unchained Series" design, according to the maker: "The artist's design on the face of the coin represents us breaking free from the "chains that bind us" to the banks. In front of the bank, there is a pig and a dog sitting (the pig representing a banker & the dog a businessman), and the people running from the collapsing bank are considered as the sheep that are freeing themselves. This is a reference to the Pink Floyd album, Animals. The crying eye at the top of the bank is the Illuminati eye that is now closed and crying, the sad "pig" bankers who have lost from the liberating peer-to-peer money system that is Bitcoin."
Lealana is based in Hawaii but these coins were minted at the Northwest Territorial mint in Washington state. They are most known for their Lealana Litecoins, which were minted in silver and early followers after the trailblazing Casascius Bitcoins
These Lealana coins are the "Buyer Funded" model, and do not contain or come with any digital Bitcoin value, but any amount of Bitcoin can be loaded onto them for cold storage. They have a unique Bitcoin address assigned to them with private key inside. In this case the denomination or face value of 0.1 Bitcoin is just a suggestion; any amount of BTC can be sent to the coins
All coins are in mint condition (have never been handled) or the condition they were in coming from their maker. Not really in any hurry to sell these coins and don't need the money, so probably won't come down a ton on price, but can negotiate discounts if buying a few. I feel like these prices are pretty fair based off of current and past sales of similar coins.
Payment Info:
Will take payment in Bitcoin or PayPal Friends & Family (leave note line blank), and/or will accept PayPal G&S +3% from trusted members with positive feedback.
Shipping Info:
Free standard tracked shipping for US residents (this will be a small bubble mailer with First Class postage) or you can add $3 and I will bump you up to 2-Day Priority with a Small Flat Rate Box.
Willing to ship nearly anywhere in the world. I will always try to ship for as fair a price as possible, so if you're outside the US and want to buy, ask for a quote and I will see what options we have.
Will Ship Same Day Payment is Received 99% of the Time!
Any Questions Just Ask! Thanks
About Physical Bitcoins/other cryptos:
In 2011 a man named Mike Caldwell, an avid supporter of cryptography and Bitcoin, had an idea to mint physical coins that could represent digital Bitcoin value in a more conventional way, so that more people would be able to conceptualize and understand this new digital cryptocurrency technology. He came up with a way to mint a physical coin that actually contained the digital Bitcoin value it represented. On one side of the coin, he had a recessed groove stamped into it. He then securely and safely generated new Bitcoin address public & private keys, printing the private keys (needed to spend the funds) and placing them in the recessed groove. He then had complex & layered tamper-evident holograms created to cover the private key, which served 2 purposes: 1- these complex holograms made it harder to ever create a believable counterfeit of his coins, and 2- when the holograms were peeled back exposing the private key needed to spend the funds, it left a honeycomb pattern behind, which would instantly tell someone considering buying one on the 2nd market whether the coin still contained its valuable BTC funds, or if it had been spent. He called his coins Casascius physical Bitcoins, and they proved to be very popular, with several different denominations and Series released over a couple years' time. Today these coins are highly valued & sought after collectors' items. Many individuals, groups, and companies followed suit in the years that followed, designing and minting their own physical crypto coins. And that's where we are today with these coins I have for sale. :) I tried my best to explain how physical Bitcoins work in a limited space, but it is hard to fully summarize such a topic in so few words, so if you have any questions just ask!
submitted by snarlpill to Coins4Sale [link] [comments]

[BOUNTY BONUS. Level: CODER] Review the source code for the Printer tool

Skills required: Github, C#
Clone the Github repo and dig into the source code in the Printer folder.
Note that there are a lot of forms in the Forms folder, but only "frmPrototype" and "TemplateEditor" are my original creations. All the others (which are not included in the Visual Studio Project file any more) are from the Bitcoin Address Utility project which this is built on top of. Equally, all of the really clever code in the Model folder, which does all the cryptography stuff, is stuff I inherited. Modifications were made to both the old forms and some of the Model classes to make that utility multi-coin-ready.
As with the request for code-review of the Loader tool, please check for signs of impropriety on my part. Of course I'm going to say "I haven't put anything in there to leak the private keys for your paper wallets" - consider this an invitation to get paid for looking!
Output: Please leave specific comments in this thread.
Reward: From Ð100 for comments which indicate you've had a quick look at the source, up to Ð2000 for greater depth and detail. Possibly even more, if you spot a big problem I hadn't thought of.
submitted by BuxtonTheRed to walletprint [link] [comments]

[WTS] Physical Dogecoins from Spain that contain their Face Value of 10,000 DOGE! Only 500 Minted! Plus Shibanu Dogecoins from the EU <500 Minted!

EDIT: 10/9/15 - I have updated the listing as 2 of the coins have been Sold. There are still 3 of the Crypto Imperator 10,000 DOGE coins left that are truly some beautiful coins, and each contain their Face Value/Denomination of 10,000 Dogecoins, yet any amount can be sent to its address and the coin used as a secure cold storage wallet. Their holograms are Visually Stunning!
Check my personal Limited Edition #95 CI 10,000 Dogecoin graded MS67 by ANACS in the photo album; it is a beautiful coin! It is the last 2 pictures; the very last pic is a duplicate and not the MS67.
Verification and More Pictures (Sorry the verification date is a few days old; I took the pictures and planned on listing them but it was a pretty hectic week)
Click for Full Size/Higher Resolution!
Hey guys, I have a huge collection of physical Bitcoins & other physical cryptos (such as these physical Dogecoins), and I'm selling a few extras. I love all coins in general, but these are my favorite to collect closely followed by old world silver coinage & Norfed Liberty Dollars.
Here is some of my feedback from Reddit sales
Here is my eBay profile with 100% Feedback
Here is my BitcoinTalk profile, where I have probably had the most dealings (Click on "Trust" to see Feedback)
(4 3 Available) Crypto Imperator 10,000 Dogecoins, and some background info. below:
Price per Crypto Imperator 10,000 Dogecoin -- $24
First coming out of Spain in 2014, the 10,000 Dogecoin Series were the first coins ever released by Crypto Imperator, now an established and respected manufacturer of physical crypto coins. With a very low mintage of only 500 coins, some excellent minting strikes, and beautifully complex security holograms, these coins were a hit from the start and quickly sold out. The first wallet-type physical Dogecoins ever minted, each coin contains its face value of 10,000 Dogecoins.
The zinc-alloy 10,000 Dogecoin was first released in June 2014 and is 39mm in diameter with a thickness of 3mm. The denomination on the face of the coin is "10,000 DOGE", and each coin was funded with that amount of Dogecoins by the creator. An appealing yet complex tamper-evident security hologram covers the private key to a unique Dogecoin address containing the coin's funds. The coin can be funded with any amount of extra Dogecoin by the buyer if desired, and can be used as a secure cold storage Dogecoin wallet. If you are ever ready to spend the funds contained within the coin, simply peel the hologram off of the coin to reveal the private key, which you can then import into your Dogecoin wallet of choice (however this will probably reduce the value of the coin as a collectible).
The obverse of the coin features a large centered portrait of a shiba inu dog, the dog breed famous for the "Doge" internet memes and the cryptocurrency Dogecoin. Next to the 'Shibe' is the word "Wow" written in the appropriately chosen font of 'Comic Sans'. Above the Doge portrait reads the slogan, "in shibes we trust", and on the bottom of the coin the denomination "10,000 DOGE" is stamped.
On the coin's reverse is the manufacturer's name "CryptoImperator" across the top and its year of minting "2014" along the bottom, the two sets of writing separated by a beautiful floral print that goes up both sides like a vine. In the center of the coin the tamper-evident security hologram is placed, covering up the coin's private key. Crypto Imperator's hologram is one of the best; there are so many different layers in it and each has a different look depending on which angle it is viewed from (which is why I included so many different pictures). Among the different features that can be seen in the hologram are the words "Crypto Imperator Original", a rocket flying to the moon with the words "To The Moon" present, and a Roman-type figure above 2 pillars and the words "Crypto Imperator". In the center of the hologram a small window is cutout, showing the first 8 characters, or 'First Bits', of the coin's Dogecoin address.
SOLD! (1 Available) Shibanu 50,000 Dogecoin (Un-Funded, DIY physical Dogecoin) and some background info. below:
Price for the Shibanu Dogecoin -- $24 SOLD!
The very first coin released in September 2015 by Shibanu (a new physical crypto coin maker), the Shibanu 50,000 Dogecoin coin is a DIY physical Dogecoin. Each purchase includes 1 coin in a protective flip, and 1 tamper-evident security hologram (for placing a private key and assembling the coin if you choose to do so). This coin has a beautiful gold-plated finish that just shines and pictures do not do it justice.
The Shibanu 50,000 DOGE coin was first released in early September 2015 and is 38mm in diameter with a thickness of 2.5mm, composed of Zinc Alloy with a beautiful and lustrous Gold-Plated finish. The recommended denomination on the face of the coin is 50,000 DOGE, but these coins are unfunded as they were originally sold, and any amount of Dogecoin can be loaded onto them if desired. They can be used as a secure cold storage Dogecoin wallet if you choose to print and place a private key and assemble the coin with one of the tamper-evident security holograms. Please note that these coins are sold unfunded, and do not contain or come with any actual digital Dogecoin value. If you are ever ready to spend the funds contained within the coin (if you've assembled & funded it), simply peel the hologram off of the coin to reveal the private key, which you can then import into your Dogecoin wallet of choice. (This concept can be confusing, just ask if you have any questions!)
The obverse of the coin features the word "SHIBANU" stamped across the top, representing its maker, with "50000 DOGE" (representing its suggested denomination, or face value) stamped across the bottom. A large "D" is stamped into the center, with a Shiba Inu dog leaning on the top, which represents the Doge meme. To the left and right of the large "D" are the phrases "Multus Moneta" and "Multus Fortuna", which roughly translate from Latin to English as "Much Money" and "Much Fortune". The large "D" in the center also has an X pattern behind it, and those surfaces are smooth and shiny strikes, while the background has a nice contrasting textured strike.
The reverse features the word "DOGECOIN" stamped across the top in an arched fashion with the year of issue "2015" stamped across the bottom. There is an indented circular area in the center on the reverse, where a private key can be placed and covered with the provided Shibanu tamper-evident security hologram, if you choose to assemble it and/or use it as a cold storage Dogecoin wallet. Shibanu's first holograms are very appealing on the eye with many different elements, layers, and colors, depending on which angle the coin is viewed from. They feature a repeating "SHIBANU" logo in the background with a dog's paw prints and a rocket heading to the moon in the center, which has a letter "D" and the maker's name "Shibanu". There is also a small window cut out in the center of the hologram so that the coin's "First Bits", or first 8 letters of a Dogecoin address, can be viewed to verify funds contained within.
These coins are DIY (Do It Yourself) physical Dogecoins and as such are sold as unfunded kits containing 1 coin and 1 tamper-evident security hologram. The positive aspect of buying a DIY physical Dogecoin is that you don't have to trust anyone with the private keys to your Dogecoin addresses (and Dogecoin funds). With your coin, your wallet's security will be in your own hands if you choose to generate, print, and place a private key within your coin. The tamper-evident security holograms are designed in a way that if somebody gained access to your physical coin and pulled off the hologram to access your private key, it would be obvious it had been compromised due to a visible honeycomb pattern left across the back of your coin. It is your choice if you want to print a private key and assemble your coin, or leave it un-assembled as it is sold. If you need help or have any questions about generating and printing private keys for your coin, just let us know and we will send you some helpful resources and instructions.
Payment Info.- Bitcoin and/or PayPal Friends & Family highly preferred at the moment (Please leave note/comment line blank if paying with PP F&F) but will also accept PP Goods & Services (add 3% to your total). Also, I almost forgot to add- I will also definitely accept Dogecoins as payment for these physical Dogecoins!
Shipping Info.- $2.25 for basic, tracked shipping in the US via First Class Parcel (no matter if you buy 1 or all 5 coins); this will be extremely well-packaged in a bubble mailer and comes with tracking and delivery confirmation for free. If you want Priority 2-Day (which includes $50 insurance), just add $5 to your total.
Always willing to ship international at cost, and can do so very affordably. PM if interested in buying overseas.
Also- I package very securely & discretely, and drop off each package by hand- so once it's shipped you own it unless you want to pay extra for insurance. I will say though I have never had a package lost out of hundreds (knock on wood..)
About Physical Bitcoins/other cryptos:
In 2011 a man named Mike Caldwell, an avid supporter of cryptography and Bitcoin, had an idea to mint physical coins that could represent digital Bitcoin value in a more conventional way, so that more people would be able to conceptualize and understand this new digital cryptocurrency technology. He came up with a way to mint a physical coin that actually contained the digital Bitcoin value it represented. On one side of the coin, he had a recessed groove stamped into it. He then securely and safely generated new Bitcoin address public & private keys, printing the private keys (needed to spend the funds) and placing them in the recessed groove. He then had complex & layered tamper-evident holograms created to cover the private key, which served 2 purposes: 1- these complex holograms made it harder to ever create a believable counterfeit of his coins, and 2- when the holograms were peeled back exposing the private key needed to spend the funds, it left a honeycomb pattern behind, which would instantly tell someone considering buying one on the 2nd market whether the coin still contained its valuable BTC funds, or if it had been spent. He called his coins Casascius physical Bitcoins, and they proved to be very popular, with several different denominations and Series released over a couple years' time. Today these coins are highly valued & sought after collectors' items. Many individuals, groups, and companies followed suit in the years that followed, designing and minting their own physical crypto coins. And that's where we are today with these coins I have for sale. :) I tried my best to explain how physical Bitcoins/Dogecoins/etc. work in a limited space, but it is hard to fully summarize such a topic in so few words, so if you have any questions just ask!
This can all sound so complicated and confusing to someone unfamiliar with Dogecoin/cryptocurrencies and how they work. If you have any questions about these coins or Dogecoin in general, please reach out to me via a message and I would be glad to help you out!
Thanks for Reading!
submitted by snarlpill to Coins4Sale [link] [comments]

How does one confirm that a physical Bitcoin actually is funded?

Here is a link to Casascius Bitcoin: https://www.casascius.com/btcsingle1.jpg
The first eight digits of the public key are shown. How can I use these eight digits to check the balance?
I tried on blockchain.info but it did not recognise them.
I don't care about this particular Bitcoin but the questions refers to addresses that have been truncated (perhaps due to a lack of space as is the case on a physical Bitcoin).
submitted by bintytinty to Bitcoin [link] [comments]

(Potentially) 25101 unspent Casascius Coins

Intro

Lately I've been researching bitcoin cold storage and have become increasingly more interested in Casascius Coins. Unfortunately Mike Caldwell had to suspend selling the coins preloaded w/ btc so now you have to buy them blank and load them w/ the btc yourself.
While exploring the site I found a full list of all Casascius coins ever minted. This was so interesting that of course I started picking out addresses at random and looking them up on the blockchain to check their balance.
I noticed that many of the addresses that I checked either had 0 transactions/balance, which leads me to believe that at least some and perhaps many of the coins in the list never actually had any btc loaded onto them, or had already been 'spent.'
This got me wondering exactly how many of the listed coins had not been spent. So I decided to write a short script to query the block chain and figure it out (yay transparency!).
First I started with blockr.io's Address Balance API because it accepts multiple input values. After experimenting it appeared to be able to return the balance of up 20 wallets at a time without falling over.
So I wrote a ruby script which pulls the values out of the fulllist.txt file into an array. It then loops over the array and checks the blockchain 20 addresses at a time for the balance. If any address has a balance it sets it aside.
require 'httparty' tmp_arr = [] addresses_still_with_coins = [] casascius_coin_addresses = [] File.open('fulllist.txt').each do |line| casascius_coin_addresses << line end casascius_coin_addresses.each_with_index do |address, index| tmp_arr << address.gsub("\n","").gsub("\r","") if tmp_arr.count == 20 coin_string = tmp_arr.join(",") success = HTTParty.get("http://btc.blockr.io/api/v1/address/balance/#{coin_string}") success['data'].each do |balance| if balance['balance'] > 0 addresses_still_with_coins << balance['address'] end tmp_arr = [] end end end File.open("unspent_casascius_coins.txt", "w+") do |f| addresses_still_with_coins.each { |element| f.puts(element) } end 
You might have noticed that this code leaves 19 addresses at the end that haven't been checked. Yea I just plugged those in by hand.
The results can be seen in this gist 'Unspent Casascius Coins'. There were 25101 coins which had a positive balance which would lead me to believe that they had never been spent.
Please let me know if you see any fault in my logic here or if you have a coin(s) on the fulllist that you've not spent which isn't on my final list of 'Unspent Casascius Coins.'
Thanks!
submitted by cgcardona to Bitcoin [link] [comments]

[WTT] 1x 2011 Series 2 Casascius Bitcoin for Lealana Litecoins

I would like to trade a Casascius physical bitcoin (1BTC) from 2011. It does not have the hologram error. I received this directly from Mike Caldwell in late 2011. It arrived in an anti-static bag and has remained in there, inside my safe, ever since. Here are a couple of scanned images I attempted to make (sorry, my scanner roamed in the days of dinosaurs): front and back. It is in pretty great condition as far as I can tell. The minikey code on the back is 1CASu4jE, which can be verified at http://casascius.uberbills.com/ and typing in said minikey, or looking up the full public key from https://casascius.com/fulllist.txt (in this case, it is 1CASu4jE2bazPHVukNhKkmuV1LUDwLuiZV) and looking it up at blockchain.info [link]
The current conversion rate of BTC->LTC at the time of posting this is 1LTC=0.0253BTC, making it roughly 39.5LTC=1BTC. However, the USD value of these physical coins is different. Spot checking sold items on ebay, the Casascius 2011 series 2 coins have sold from $1600 on the low end to $1800 on the high (and most common) end. For the Lealana, this was a little harder to gauge. Of what has been sold, as far as I can tell, there are no Series 1 coins under completed auctions. However, the numbered Series 2 auctions that have sold have ranged from $41 (most recent) up to $100 back in January. Of what is currently listed, the Series 2 are going for $100 while the Series 1 are going for $150. However, watching over the past couple of weeks, they aren't selling at these prices.
I would like a mix of series 1 and series 2 Lealana coins, however, the amount to trade will depend on how many of whatever coins are up for trade. Make an offer and I'm sure we can to some sort of agreement.
I'm not sure how escrow would work in cases like this, but I am willing to do whatever you feel comfortable with. I prefer to trade with someone who has a documented good reputation. I also would like for these (on both sides) to be sent with tracking, insurance, and signature required.
Thank you.
submitted by CrazyTillItHurts to ltcmarket [link] [comments]

verification of a casascius bitcoin Holding a Bitcoin: The First Tangible Bitcoin by Casascius (5 BTC) — worth 300x its weight in gold Bitcoins Casascius physical bitcoin coins All Bitcoin Address balance How To Crack BitCoin 2019 redeeming casascius bitcoin - YouTube

Casascius Bitcoins are physical coins you can hold - and each one is worth real digital bitcoins. Bitcoin is the most widely used open-source peer-to-peer "cryptocurrency" that you can send over the Internet without a bank or a middleman. Each Casascius Bitcoin is a collectible coin backed by real Bitcoins embedded inside. Each piece has its own Bitcoin address and a redeemable "private key ... Generates Bitcoin addresses, converts between hex/address and public/private keys. - casascius/Bitcoin-Address-Utility Mike Caldwell, nicknamed Casascius, produced physical coins which contain Bitcoin from 2011 to 2013, which went on to become the most highly-regarded brand of physical Bitcoin. Th Can anyone tell me how I would check the public address on my old Casascius Bitcoins? I have 3 total cons but I am unable to find where or how to check the public addresses on the coins for they only have 8 characters. I have listed all 3 of the pubic addresses below if anyone can help. Thank you in advance. 1) 134xRg9x 2) 1359wf1p 3) 1348FHtv ... - Message signed with bitcoin private key or confirmed by payment of this address. - Bitcoin Address is not signed or verified. Please be careful with provided links. We can't guarantee properly works of the linked sites.

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verification of a casascius bitcoin

Physical bitcoins exist; coins minted by numismatic enthusiasts that contain the digital bitcoin within. The most famous physical bitcoin was minted by Casascius from 2011 to 2013 before the the U ... verify the bitcoin balance of a casascius bitcoin token and redeeming using mtgox.com Each Casascius Bitcoin is a collectible coin backed by real Bitcoins embedded inside. Each piece has its own Bitcoin address and a redeemable "private key" on the inside, underneath the hologram. A NEW OPPORTUNITY IN THE WORLD OF BITCOIN Many those who are looking for years of software, blasting, or to generate bitcoins, but without success. In this video I show you a script that allows ... The First Physical Bitcoin Had a Typo and Was Worn as Jewelry - Stefan Thomas - Duration: 1:34. CoinDesk 523 views

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