Blockchain-anchored document proof with Hedera

A sealed PDF is hashed on your device with SHA-384. HashSign can anchor that digest on Hedera. The file itself is not written to the ledger. Anchoring is a paid feature.

The document stays on the device until you send or share it. Optional cloud review runs only when you tap it. HashSign is free to start.

Anyone who later hashes the same PDF can compare that SHA-384 value with the anchored digest. The digest is not reversible, so the contract cannot be rebuilt from the ledger entry.

HashSign cannot delete a digest that is already on the ledger. HashSign is not a licensed notary and does not replace one.

Read about document signing, or return home.