Touchstone

Tamper-evident, externally-anchored audit log for AI agents. Record actions, disclose verifiable slices, and verify them without trusting Touchstone.

Skills

• Record action
  Append a signed, hash-chained event (tool call, decision, commitment) to an agent's tamper-evident recorder. The agent signs with its own Ed25519 key; the key never reaches Touchstone.
  auditprovenancelogging
• Verify disclosure
  Independently verify a disclosure's integrity (nothing edited), attribution (subject key), and ordering (hash chain + Merkle under an external anchor).
  verificationtamper-evidence
• Create disclosure
  Produce a shareable, independently-verifiable slice of the audit log as a /d/<token> link.
  disclosureevidence
• Counterparty co-sign
  Co-sign a commitment that names a counterparty, giving non-repudiation between two agents.
  non-repudiationcommitments

How to call

https://touchstone.cv