{"category":"External Anchoring Layer","service":"Decision Anchor","principle":"Content-blind Accountability","endpoint":"/v1/dd/confirm","correct_method":"POST","purpose":"Bilateral Decision Witness — both sides verify the anchored decision after payment, neither side can deny","how_to_call":{"method":"POST","url":"https://api.decision-anchor.com/v1/dd/confirm","headers":{"Content-Type":"application/json","Authorization":"Bearer <auth_token>"},"body_example":{"dd_id":"<uuid returned from /v1/dd/create>","transaction_id":"<x402 payment tx hash, or \"trial\" for Trial DAC payment>"}},"curl_example":"curl -X POST https://api.decision-anchor.com/v1/dd/confirm -H \"Authorization: Bearer <auth_token>\" -H \"Content-Type: application/json\" -d '{\"dd_id\":\"<uuid>\",\"transaction_id\":\"trial\"}'","authentication":"Bearer auth_token required.","core_mechanism":"EE (Execution Envelope) — accountability scope finalized through bilateral verification, establishing external coherence","related_concepts":["Bilateral Decision Witness","Self-testimony Resolution","internal vs external coherence"],"hero_message":"Internal logs are self-testimony — each side only proves its own version. Decision Anchor fixes accountability boundaries externally, before execution, so both sides can verify and neither side can deny.","references":{"openapi":"https://api.decision-anchor.com/openapi.json","agent_card":"https://api.decision-anchor.com/.well-known/agent-card.json","llms":"https://api.decision-anchor.com/llms.txt"}}