Check a seal, and its date, with nobody's word for it.

Load the seal's proof file, and the file you are holding if you have it. This page recomputes every hash itself: the file, the declaration, each link of the chain, the Merkle root, and the value the outside timestamp authority signed.

This page cannot connect to anything. Disconnect first if you like.

1 · The proof

Drop the .proof.json file here, or click to choose it. It is the "Download the portable proof" button on the seal page.

2 · The file you hold (optional)

Drop the document, image or file here. It is hashed on this machine and goes nowhere.

The last step, with openssl

The authority's signature

This page has confirmed the timestamp token names exactly this chain's Merkle root and read its date. Checking the authority's signature on the token needs its certificate, so it is done with openssl, anywhere, without APIR. Save the two files, fetch the authority's two certificates, and run:

"Verification: OK" means the authority signed this root at the date shown. That, with the checks above, is the whole proof.

What a seal is, and is not

Always

A seal proves that a named person declared these exact files, and that the declaration was on APIR's hash chain by the time an outside authority timestamped it. It does not prove the contents are true, who made the work or how, or who owns anything described. An unsealed file is not a fake; most files were never sealed.

APIR, operated by RIPA PTY LTD, ABN 48 638 569 632Format apir-seal-proof/1

Check a seal, and its date, with nobody's word for it.

What was sealed

The last step, with openssl

What a seal is, and is not