We make sure your AI's records are what they say they are.
When an AI agent does something on your behalf, you need a record of what it actually did, and you need to be able to show whether that record changed after it was pinned. That is the whole job.
Most people do not trust AI right now, and that is a reasonable place to stand. But trust does not have to stay a feeling. It can be built, in code, and checked by somebody who believes none of it.
Hosted commands send only fingerprints, never your files. Checking a proof needs no account or key. That part is free forever.
A record nobody can check is not a record. It is just a story with better formatting.
Agents are starting to pay each other, and nobody can check the receipts.
Agents are starting to transact. With the people who own them, with other companies, and increasingly with each other. Every one of those runs on trust, and right now that trust is asserted: one side says what happened and the other decides whether to believe it.
A market where either side can check the record without trusting the other side is a market that can actually grow. Not because everyone became honest, but because honesty stopped being the thing you had to take on faith.
The line we will not cross: we prove the record is intact, not that the actions were right. Anyone selling you proof of good intent is selling something nobody knows how to build.
If you place AI on the EU market, these rules can reach you wherever you are.
The new European AI rules are not only for European companies. If you place AI on the EU market, they can reach you as a US company. Where your office is does not matter.
Most people running an AI product have not checked whether that is them. It usually is.
Where exactly that is written, and when it lands.+
This is Article 2 of the Act, which applies it to providers placing AI on the EU market "irrespective of whether those providers are established or located within the Union or in a third country", and again where the output of the system is used in the Union. The record-keeping duties themselves land in December 2027 and August 2028, so there is time. There is not time to build it the week it is asked for.
One package, three pieces at its heart, and each one names what it does not prove.
Ledger
Locks each entry to the one before it, so an edit, deletion or reorder breaks the record and names the exact line. You own the file.
Adapter
Your AI keeps its own notes. This is the recorded line. It sits between the AI and its tools and captures every call that goes through it, whether the AI writes it down or not.
verify: arcaeon.io/verify
Witness
Records your position with a witness we operate, so a log cut short after a pin no longer matches it. The proof lives in a public repository, so checking it does not need us.
How all three actually work, and what each one does not prove →
The ledger and the adapter ship in one package, arcaeon, with everything else it does: get it for your AI.
Free, and nothing to install: stamp a file or verify a receipt on the tools page.
We make the small, real pieces, one at a time.
The agent economy is being built right now: the payment rails, the identity layers, the reliability tooling. Arcaeon makes the small, real pieces: things a builder can drop in today, own, and check. One product at a time, each one shipped to a real user or cut.