AOTrust — Cryptographic Proof of Existence for AI Agents

AOTrust issues PDRs (Provenance Data Records) — 239-byte cryptographic receipts proving a digital artifact existed at a specific time. $0.01 USDC on Base via x402. Anchored daily to NEAR blockchain. No account needed. Supports ordinary (v0x03) and bilateral (v0x04) signatures.

Quickstart

# 1. Compute SHA-256 hash of your artifact
HASH=$(echo -n "Hello AOTrust" | sha256sum | cut -d' ' -f1)

# 2. Request notarization → get 402 payment details
curl -X POST https://api.aotrust.link/notarize \
  -H "Content-Type: application/json" \
  -d "{\"work_hash\":\"$HASH\",\"agent_sig\":\"\",\"agent_pubkey\":\"\"}"

# 3. Pay $0.01 USDC on Base (EIP-3009), then POST with x-payment header
# Full example: see SKILL.md → "Step 3: Pay"

For full EIP-3009 signing code (Python + ethers.js examples), see SKILL.md.

Related MCP server: DCL Evaluator

Interfaces

Endpoints:

• API: https://api.aotrust.link/notarize

• MCP: https://api.aotrust.link/mcp

• Verify: https://verify.aotrust.link

• Docs: https://docs.aotrust.link

PDR Specification & Tools

• pdr-spec.md — PDR v2.3/v2.4 binary format (Internal 193B + External 239B, ordinary + bilateral)

• pdr_parser.py — standalone parser, zero dependencies, offline verification

• aotrust-notarize/SKILL.md — full integration guide for AI agents

Comparison

License

MIT