On 10/21/21, Stefan Claas <spam.trap.mailing.lists@gmail.com> wrote:
Hi all,
I am currently noodling around with an idea, how to link a (digital) item to, for example, a Bitcoin address and would like to hear your thoughts.
I would appreciate it if you read my thread.
https://groups.google.com/g/sci.crypt/c/SYeA5AuonSg
Regards Stefan
Hashcash+Bitcoin - securing (digital) items Oct 21, 2021, 5:23:58 PM (12 hours ago) Hi all, I like to show a user-friendly method, which IMHO should allow artists or other people to trade items, where the person who like to obtain an item can be confident that the item is offered by its original author. The first step for this method is done with example content from me, which you can download and verify: https://ipfs.io/ipfs/QmegafEAy6D88QgiNdu16ivUf3jt3pzXKwuGibg6kNRnpZ You see there are three items, one is the item ORIGAMI.jpg, the second one is the tamper-proof QR-Code Stefan_Claas-ORIGAMI.png and the third item is the certificate from a professional Blockchain timestamping service, where I signed up. If you decode the QR-Code you will see the following content: Author: Stefan Claas, Berlin, Germany Domain: radio-eriwan.su Item: ORIGAMI.jpg Hashcash: 1:20:211021:bc9b48826b707ec13994b637f6451e98a8f7efde1c5302f9b12f32920165a81:bc1qyvjfu24y4rn32xv60vxefk7ejun97fqe846awm:jmpaFLyy:ba3eb Details of the procedure: The original doodle ORIGAMI.jpg I created in the mid-'90s and hashed the image with a SHA256 hash. I then created it for demo purposes a Bitcoin Wallet with the following address: bc1qyvjfu24y4rn32xv60vxefk7ejun97fqe846awm With Hashcash I bound the sha256 hash from the image to the Bitcoin address as you can see with the above Hashcash: string QR-code content. One can verify the validity of the Hashcash string with Hashcash: https://github.com/sac001/hashcash To verify the QR-Code go to https://originstamp.com/verify/ it should show Success and in this case the proof is in the Aion Blockchain. The .pdf document is a certificate issued to me which explains the steps used for Blockchain timestamping and later I get also an Etherium Blockchain and Bitcoin Blockchain proof. Sign-up for the timestamping service is free and you can get five timestamps per month for free. There is also another timestamping service (opentimestamps.org) but I like this service much more. I think this is an easy method to prove ownership so that later, once other steps are thought out, an item can be verified and linked to a cryptocurrency address or even bank account or PayPal account. Ownership in that way, that when I create an item and immediately Hashcash and timestamp it with the location where it is hosted and the ability to do a Google image search, it is hopefully good enough for an average person not to digitally sign items with ones own private key and an attacker hopefully thinks twice, prior stealing content and re-distributing it. Regards Stefan Oct 21, 2021, 6:30:36 PM (11 hours ago) On Thursday, October 21, 2021 at 5:23:58 PM UTC+2, Stefan Claas wrote:
Hi all,
I like to show a user-friendly method, which IMHO should allow artists or other people to trade items, where the person who like to obtain an item can be confident that the item is offered by its original author.
The first step for this method is done with example content from me, which you can download and verify:
https://ipfs.io/ipfs/QmegafEAy6D88QgiNdu16ivUf3jt3pzXKwuGibg6kNRnpZ
You see there are three items, one is the item ORIGAMI.jpg, the second one is the tamper-proof QR-Code Stefan_Claas-ORIGAMI.png and the third item is the certificate from a professional Blockchain timestamping service, where I signed up.
If you decode the QR-Code you will see the following content:
Author: Stefan Claas, Berlin, Germany Domain: radio-eriwan.su Item: ORIGAMI.jpg Hashcash: 1:20:211021:bc9b48826b707ec13994b637f6451e98a8f7efde1c5302f9b12f32920165a81:bc1qyvjfu24y4rn32xv60vxefk7ejun97fqe846awm:jmpaFLyy:ba3eb
Ouch, I forgot, while copy/pasting, to include the last character in the sha256 hash, a 'c'. Regards Stefan Oct 21, 2021, 8:23:07 PM (9 hours ago) On Thursday, October 21, 2021 at 5:23:58 PM UTC+2, Stefan Claas wrote: I guess my adventure with this is realizable by setting up a web server on my domain with a gallery and then combine it with this cool service: https://www.blockonomics.co/ which allows after a person paid in BTC he will automatically receive a download link of the item(s). Once time allows I will set up a server and try my solution out. Then I must figure out of course if the number of items can be limited with this service so that I do not need to take down the product after n sales. For the product, the display would then only have a smaller preview image available and an information page on how this all works, compared to NFts. (My motto for this: "resist the mainstream and follow your own dreams" :-)) Regards Stefan