Generate a cryptographic proof of existence. Your file never leaves your device.
SHA-256 Hash:
Verify Evidence
Retrieve immutable public records from the blockchain.
— or paste the hash directly —
Retrieved Record
File SHA-256 Hash:
Registered Owner:
Description:
File Name:
Registrar Wallet:
Timestamp (UTC):
Block Number:
Explorer Link:
How it works
Your browser computes the SHA-256 digest of the file locally — the file never leaves your device.
The 32-byte hash + owner metadata is written to an immutable smart contract on Polygon.
Anyone can later re-hash the same file and instantly verify the original registration timestamp and owner — without you ever revealing the file itself.