TrustNotch

Gives Claude five tools to submit agent actions to TrustNotch's tamper-evident log API and verify cryptographic proofs locally. Each logged entry gets an Ed25519-signed receipt, Merkle inclusion proof, and eventually a Bitcoin anchor. The verify_proof tool runs all checks on your machine without calling TrustNotch, so proofs stay valid even if the service disappears. Reach for this when you need compliance-grade audit trails for AI agents under frameworks like the EU AI Act, or when "trust us, it's immutable" isn't acceptable. Requires a TrustNotch API key, currently in early access. Ships with a standalone Python verifier you can run offline against any proof bundle.