This decentralized app holds a registry of documents in a Solidity smart contract.
A sha256sum is stored on the blockchain, and then displayed as hex and as a robohash!
Contract at 0xd76A8EE2e61Df833380bCad14a94C5e8cA15aA4d
RoboDocHash uses Polygon MATIC to store document checksums.
RoboDocHash confirms when an author has generated a document, image any file.
It is a blockchain notary.
Robohash GitHub . BArobots NFTs