Step 1: Select file to be fingerprinted
All data displayed on the right is stored publicly on the Steem chain
Storing the fingerprint is obligatory, the rest of the data you can optionally add yourself:
The fingerprint will be stored utilising the public transfer method.
Therefore you need to pick an (any) amount of Steem or SBD you need to send.
Your donation will be used to maintain this service.
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Proof.ink's service is pretty straightforward. If you have a document of which you want to know with 100% certainty that it's contents has not been changed, tampered with or altered in any form, use Proof.ink.
Proof.ink works by fingerprinting your file (no matter how big), without the need to upload it, inside your browser. The result of this calculation is a unique SHA256 hash / fingerprint of your file.
By enabling you to store the fingerprint publicly on the Steem blockchain, Proof.ink can guarantee the integrity of the fingerprint of the file as how it was created at a given time by a given user. This way others can use this service to validate the fingerprint on the blockchain and against the file they receive.
The Steem chain serves as a public accessible ledger with provable immutability at it's core, for a trustless public store of the derived file's fingerprint.
So you have received a file along with a
proof.ink.*.txt certificate file and want to validate the integrity of the original file?
Step 1: Select files to be validated. Select both the original file and the
proof.ink.*.txt certificate file in one go.