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Title: [WTS] 2013 brass 1 and 0.5 Casascius coins with certificate Post by: dnaleor on May 11, 2015, 08:20:11 PM Hi!
I'm looking for a decent offer on 2 of my casascius coins. Brass, both 0.5 and 1 BTC from 2013. Good condition, were kept in a capsule. https://i.imgur.com/BgNoBAx.jpg https://i.imgur.com/Qxfa1Av.jpg https://i.imgur.com/3SaiVtM.jpg This is how the certificat works. You'll get the files that are needed when you buy the coins. I should probably explain a little what this "proof of existence" actually is and what it can be used for. The printout you see in the photo is neither necessary nor adequate to proove anything, it's merely a printout of some data to make it easier to verify/find the data. The actual proof that the coin existed at a certain point in time (in this case May 31st 2013) is in the Bitcoin Blockchain. Here's what I did to produce this proof
Here's how the existence of the coin on May 31st can be proven:
Here's why such a proof can be useful in the future: Currently it's highly likely there are no counterfeits of casascius coins around. It's just not worth the effort yet. However assume it's the year 2023 and you decide to sell your precious 0.5 BTC coins back from 2013 when the first batch of these was made and the potential buyer is sceptical because there are now counterfeits around. Wouldn't it be great if you could proove that this coin has actually existed back in May 2013? It probably would increase the buyers confidence quite a bit. Well: you can. Here's Mike himself suggesting resellers could do this: Cryptography is one of those things that gives me a leg up on every possible counterfeited item in the world. I assume my product WILL be counterfeited. But when I start producing digitally signed PDF photos of my own product, I've got the counterfeiters beat. The more possible I can make it for you guys to authenticate my genuine products, the more value a genuine product will have, and the less lucrative it will be to counterfeit them. This will only work for products I produce from today forward, but here is an idea you can do right now. The counterfeiting hasn't happened yet. Go throw your current stash of Casascius Coins on a scanner, scan a photo of them, take a 160-bit hash of the file, and then work that hash into the block chain somehow. Convert the hash to a bitcoin address and send a satoshi to it (my Bitcoin Address Utility can do this, for example). Your photo with its supporting hash in the block chain will be publicly verifiable proof that the coin in your photo existed today. --- If you are interested, just post a bid here or send me a PM. Shipping: I can ship pretty cheap (4 EUR) to Belgium or the Netherlands (both not insured, but including tracking) For other shipping costs, please PM. If more pictures are needed, just ask :) Title: Re: [WTS] 2013 brass 1 and 0.5 Casascius coins with certificate Post by: dnaleor on May 11, 2015, 10:12:24 PM I can also throw in some free Casascius aluminium coins if you buy both ;)
Title: Re: [WTS] 2013 brass 1 and 0.5 Casascius coins with certificate Post by: dnaleor on May 12, 2015, 08:01:15 PM sold!
Title: Re: [WTS] 2013 brass 1 and 0.5 Casascius coins with certificate Post by: TookDk on May 13, 2015, 04:41:04 PM Do you by any change have any Casascius 1 BTC Silver, I know molecular was sourcing them too.
I would be interested in buying any you have, if they are in premium quality. Title: Re: [WTS] 2013 brass 1 and 0.5 Casascius coins with certificate Post by: dnaleor on May 14, 2015, 02:18:03 PM Do you by any change have any Casascius 1 BTC Silver, I know molecular was sourcing them too. I would be interested in buying any you have, if they are in premium quality. I have one, not bought from molecular, but produced my own certificate. Although this is "my precious" and I'm not selling below 5 BTC ;) sorry Title: Re: [WTS] 2013 brass 1 and 0.5 Casascius coins with certificate Post by: TookDk on May 14, 2015, 02:27:09 PM Do you by any change have any Casascius 1 BTC Silver, I know molecular was sourcing them too. I would be interested in buying any you have, if they are in premium quality. I have one, not bought from molecular, but produced my own certificate. Although this is "my precious" and I'm not selling below 5 BTC ;) sorry OK no problem, I completely understand you, mine are also precious to me ;) I can offer 2.6 BTC if the quality is supreme, but that is far away from the 5 BTC. I thought it was worth asking, since they are not that easy to find anymore. Take good care of her :) Title: Re: [WTS] 2013 brass 1 and 0.5 Casascius coins with certificate Post by: dnaleor on May 14, 2015, 04:06:29 PM Do you by any change have any Casascius 1 BTC Silver, I know molecular was sourcing them too. I would be interested in buying any you have, if they are in premium quality. I have one, not bought from molecular, but produced my own certificate. Although this is "my precious" and I'm not selling below 5 BTC ;) sorry OK no problem, I completely understand you, mine are also precious to me ;) I can offer 2.6 BTC if the quality is supreme, but that is far away from the 5 BTC. I thought it was worth asking, since they are not that easy to find anymore. Take good care of her :) It's a nice bid and I guess you'll eventually find a seller. But I want to keep my silver BTC for now :) Good luck! PS: wish I bought 2 when I had the chance ;) |
