VERITAS · open source · MIT

Can you prove what your AI agent actually did?

AI agents now read contracts, move money, and approve decisions on their own. When something goes wrong, the only record is usually a log that the operator can edit, lose, or quietly rewrite. VERITAS closes that gap: it signs what an AI did the moment it happens and anchors a fingerprint of the record to Bitcoin, so anyone can verify the record later without trusting the company that made it.

Verify a real record now Download the walkthrough (PDF)

The verification runs in your browser against a real Bitcoin transaction. No account, nothing to install, and the walkthrough is free with no email required.

How it works

Three steps. Only the middle one ever touches Bitcoin, and only the middle one costs anything.

Sign

The agent's action is signed the instant it happens. Signing is free, runs locally, and proves who made the record and that it has not been altered since.

Anchor

A fingerprint of a whole batch of signed records is stamped into one Bitcoin transaction. That proves each record existed by the block time and cannot be quietly rewritten. One transaction certifies an unlimited batch, so the cost per record rounds to zero.

Verify

Anyone can check the full chain with public math: signature, receipt, batch proof, Bitcoin anchor. No account, no permission, and no trust in the operator required.

Check it yourself

This page makes claims. The links below let you check them without believing anyone, including this page.

Run a live verification in your browser Watch every layer turn green, then click through to the Bitcoin transaction.

Open the verifier

See a real anchor on Bitcoin's main network 92b2c4e434ae347f867e36a5ec7a1b608fd35ca45158caa258638c82215aafa0 Confirmed in block 953,581, June 2026. Permanent and public.

View on mempool.space

Read the code and the spec MIT licensed. 10 repositories, 660+ passing tests, and an RFC-style specification with canonical test vectors.

View on GitHub

The 46-second version

The whole ecosystem, explained faster than a coffee order.

Read the whole story

The system, the reasoning, and the honest limits, at book length.

Proof of Agent

Verifiable AI on Bitcoin, and the Missing Trust Layer of the Autonomous Economy

Written in plain English for builders, founders, insurers, and anyone being asked to trust a machine. It is honest about what is new and what is not, and in about fifteen minutes it has you verify a real Bitcoin-anchored attestation yourself.

Get it on Amazon

Available in Kindle and paperback. As an Amazon Associate, the author earns from qualifying purchases.

Who this is for

Builders who want their agent's logs to mean something when it counts.
Auditors and counterparties who need to rely on records they did not produce.
Anyone whose current answer to "prove what the agent did" is "trust us."

Contact

VERITAS is designed, built, and maintained by Tutankhamun Castillo El-Bey, author of Proof of Agent. The protocol is open source under the MIT license.

For inquiries, integrations, or a guided walkthrough: tut@proofofagent.net