TrustNotch – Tamper-evident audit logs for AI agents, verifiable offline

TrustNotch has launched a tamper-evident audit log service for AI agents that cryptographically signs each action with Ed25519 receipts, batches entries into RFC 6962 Merkle trees, and anchors batch roots to Bitcoin via OpenTimestamps, enabling offline verification through an open-source verifier even if TrustNotch ceases to exist. The service offers an MCP server for integration with Claude Desktop and other MCP clients, with packages available on PyPI.

Tamper-evident audit logs for AI agents. Cryptographically signed, Bitcoin-anchored, and verifiable offline — even if TrustNotch is gone. Three steps from action to proof 1. Signed receipt on submissionAn agent submits an action over HTTP. TrustNotch returns an Ed25519-signed receipt immediately — a cryptographic commitment to the exact content logged. 2. Merkle-batched & Bitcoin-anchoredEntries are batched into an RFC 6962 Merkle tree. Each batch root is anchored to Bitcoin via OpenTimestamps, giving every entry a tamper-evident timestamp rooted in the world's most audited ledger. 3. Verify offline, independentlyAnyone can verify any entry with the open-source trustnotch verifier /how-verification-works/ — no trust in TrustNotch required. The receipt, Merkle inclusion, and Bitcoin anchor are all checked locally. A proof keeps verifying even if TrustNotch disappears. Get started Quickstart Get a key, record an entry, fetch its proof, and verify it yourself. /docs/ MCP Server Connect Claude Desktop and other MCP clients to TrustNotch. /trustnotch-mcp/ PyPI: trustnotch-mcp The MCP server package. Install with https://pypi.org/project/trustnotch-mcp/ pip or run with uvx . PyPI: trustnotch The standalone offline verifier. https://pypi.org/project/trustnotch/ pip install trustnotch .