{
  "schema_version": "letain-witness-service/1",
  "service": "POPCORN witness receipt",
  "discovery_role": "receipt_library",
  "issuer": "https://767-2676.com",
  "protocol_id": "POPCORN-WITNESS/2.0",
  "purchase": {
    "method": "POST",
    "url": "https://767-2676.com/v2/receipt",
    "content_type": "application/json",
    "payment_protocol": "x402-v2",
    "scheme": "exact",
    "price": {
      "amount": "0.001",
      "amount_atomic": "1000",
      "currency": "USDC",
      "decimals": 6,
      "network": "eip155:8453",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "pay_to": "0x5f5a631e975183d084f60d7121e967b30ec83cb8"
    },
    "request_schema": "https://767-2676.com/schemas/witness-request.v1.json",
    "response_schema": "https://767-2676.com/schemas/witness-response.v2.json",
    "unpaid_status": 402,
    "paid_status": 200,
    "headers": {
      "challenge": "PAYMENT-REQUIRED",
      "proof": "PAYMENT-SIGNATURE",
      "settlement": "PAYMENT-RESPONSE"
    },
    "explicit_payment_authorization_required": true,
    "automatic_paid_retry": false
  },
  "request": {
    "fields": [
      "payload_digest",
      "nonce",
      "previous_attestation_digest"
    ],
    "raw_payload_sent": false
  },
  "verification": {
    "cost": "free",
    "mode": "local-first",
    "keys": "https://767-2676.com/.well-known/popcorn-keys.json",
    "optional_remote_mcp": "https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp",
    "optional_remote_tool": "popcorn_verify_v2"
  },
  "client": {
    "tool": "popcorn_witness",
    "transport": "local MCP or direct issuer API",
    "source": "https://github.com/violetclaire/popcorn-temporal-anchor/tree/main/packages/mcp",
    "approve_payment_default": false,
    "wallet_custody": "payer environment; never leTAIN"
  },
  "scope": {
    "provider_booking": false,
    "provider_enrollment_required": false,
    "job_payments": false,
    "only_charge": "fresh_witness_receipt"
  },
  "terms_source": "https://767-2676.com/agent/offer",
  "terms_checked_at": "2026-10-06T20:25:10.015Z"
}