NotaryOS – Cryptographic proof of what your AI agent didn't do

Show HN: NotaryOS – Cryptographic proof of what your AI agent didn't do

NotaryOS – Cryptographic proof of what your AI agent didn't do is a company in show hn launch.

Profile

Audit logs tell you what happened. They can't prove what didn't happen — and anyone with database access can edit them after the fact.NotaryOS creates tamper-evident, Ed25519-signed receipts for AI agent actions. Each receipt is SHA-256 hash-chained to the previous one, so modifying any entry breaks the chain — pinpointing the exact tampered receipt.The feature I'm most curious about HN's take on: counterfactual receipts. These prove an agent considered actions {A, B, C}, had the capability to execute all three, and actively rejected B and C at time T. Uses a commit-reveal protocol so the decision is locked before the outcome is known.Example: agent receives a "delete all user data" instruct

As a business in show hn launch, NotaryOS – Cryptographic proof of what your AI agent didn't do is listed here with the public details available about it.

The company is listed at the Show HN launch stage of development.

Website: notaryos.org