AOTrust PDR Notarization

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.

Interfaces

Interface	Best for	Auth
HTTP API	Developers, scripts, CI/CD	x402 payment (no API key needed)
MCP	AI agents (Claude, Cursor)	OAuth 2.1 PKCE

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

Feature	AOTrust	Chainlink	OpenTimestamps	Notary.fyi
Price/PDR	$0.01	$0.25+	Free (slow)	$0.50+
Payment rail	x402 USDC	LINK	Bitcoin TX	Stripe
PDR format	239B binary	Oracle data	OTS file	PDF
AI agent native	MCP + HTTP	No	No	No
Blockchain anchor	NEAR (daily)	Ethereum	Bitcoin	None
Offline verify	Yes (pdr_parser.py)	No	Yes	No

License

MIT