File hashes stored on the Hive blockchain
* data: documents, files, images, music, zip, software, 1010101000, etcetera
Step 1: Select file to be fingerprinted
All data displayed on the right is stored publicly on the Hive 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 Hive or HBD you need to send.
Your donation will be used to maintain this service.
Don't have a Hive account? Sign up here
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 Hive 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 Hive 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.
Proof.ink is made by @roelandp
learn more - view source
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.