{
  "event": {
    "kind": 4300,
    "id": "f98d0ca578f5b83b7f5a23a90ac5991efdace958124b71cb87e5e51962529173",
    "pubkey": "95ac63a6f99ce221d67af2ab5fe203d3650ee8bac486fe22e01ae74809a41ce2",
    "created_at": 1793917008,
    "tags": [
      [
        "d",
        "sfu73z455ny4tekz"
      ],
      [
        "r",
        "https://stableenrich.dev/api/exa/search"
      ],
      [
        "proto",
        "x402"
      ],
      [
        "alt",
        "alalanet service attestation (probe)"
      ],
      [
        "status",
        "up"
      ]
    ],
    "content": "{\"type\":\"probe\",\"service\":\"sfu73z455ny4tekz\",\"url\":\"https://stableenrich.dev/api/exa/search\",\"proto\":\"x402\",\"at\":1793917008,\"status\":\"up\",\"previous\":\"up\",\"latency_ms\":253,\"http_code\":402,\"detail\":\"402 with valid terms\",\"network\":\"eip155:8453\",\"asset\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"amount\":\"10000\",\"pay_to\":\"0x325bdF6F7efAB24a2210c48c1b64cAb2eAe1d430\"}",
    "sig": "a889f0c7f3c82e1fa2a82951ad313ef5c75878b1333aace53a146c583b47ea8febe2b1594dae326684a0d25031c050f6fabb854c30f91c5ea1ab3e59717d42c6"
  },
  "event_json": "{\"kind\":4300,\"id\":\"f98d0ca578f5b83b7f5a23a90ac5991efdace958124b71cb87e5e51962529173\",\"pubkey\":\"95ac63a6f99ce221d67af2ab5fe203d3650ee8bac486fe22e01ae74809a41ce2\",\"created_at\":1793917008,\"tags\":[[\"d\",\"sfu73z455ny4tekz\"],[\"r\",\"https://stableenrich.dev/api/exa/search\"],[\"proto\",\"x402\"],[\"alt\",\"alalanet service attestation (probe)\"],[\"status\",\"up\"]],\"content\":\"{\\\"type\\\":\\\"probe\\\",\\\"service\\\":\\\"sfu73z455ny4tekz\\\",\\\"url\\\":\\\"https://stableenrich.dev/api/exa/search\\\",\\\"proto\\\":\\\"x402\\\",\\\"at\\\":1793917008,\\\"status\\\":\\\"up\\\",\\\"previous\\\":\\\"up\\\",\\\"latency_ms\\\":253,\\\"http_code\\\":402,\\\"detail\\\":\\\"402 with valid terms\\\",\\\"network\\\":\\\"eip155:8453\\\",\\\"asset\\\":\\\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\\\",\\\"amount\\\":\\\"10000\\\",\\\"pay_to\\\":\\\"0x325bdF6F7efAB24a2210c48c1b64cAb2eAe1d430\\\"}\",\"sig\":\"a889f0c7f3c82e1fa2a82951ad313ef5c75878b1333aace53a146c583b47ea8febe2b1594dae326684a0d25031c050f6fabb854c30f91c5ea1ab3e59717d42c6\"}",
  "log_index": 1,
  "proof": {
    "index": 1,
    "tree_size": 64768,
    "root_hash": "U9sF5cejlG6/VHAMR0EDQQBRcewvz38Kz3r/xxqmKls=",
    "leaf_hash": "aAjBH6UQjWuvCdvkMvFZJ6kO0taf3o1v5p4S/RR0OFM=",
    "hashes": [
      "HHnf0H26sGowEZzzBzkWFkM5BOrx0dSHUbpKkvm55hU=",
      "xEiCO7pAWyS5IOgwMEB6RnansPDZmW0CHB8QmVCFtkU=",
      "F+Cjb67AoQzAFxN/bdf+AXxHKBaaDwXuPeXixKa/AZ4=",
      "jcelQ8S8og+CKknIjS7fM4guwbD6W7lhlqjZeFMnlus=",
      "/wzSxIYbTrfpoNCBX2zLh/gSP1AFJPFla4yEssn0Lp0=",
      "RxRR7Ugw35547sFBiuqhEdmp6TI5CA7XmuJBjKdZVH8=",
      "m+zKierAI4pul2NC7Es98SSAtDT65bu33ve221aUn8Q=",
      "GFEQNtD0G7XALddiHJ9YypoGSASDIx9tgjikEQbbz7s=",
      "TblQn1zjKX38md033ldMEYWz3OwyH+8JqkYS79lk4G0=",
      "iVT5c3n6TIK5Hn018+MkYClE47aPIGvN2wL3EAGfcrQ=",
      "3d0tCBCI3LobtmITr11wfuWvJ4raIK53OZn4iy3UQ5c=",
      "7tXbpbBEpDblRQMQLcdvY8aBCbbAxFP7Dob1wbCdoIQ=",
      "NwOrLnxh84yImav6oYr8VjPQsd1mjsjbQuOGpsL3qCE=",
      "jvFNLsE7VJBGoHAXOcpdKXpzx/+Yj7QYaXObo1ji3Pw=",
      "tqnSvt9rtnyHSKvENqKC93TRm8fmqWJbriY4O9hDfTE=",
      "Omnbr9FTzDyeCJZArdLbVmVBM0USAHDzLRhTCS0h1gU="
    ],
    "checkpoint": "alalanet.com/log\n64768\nU9sF5cejlG6/VHAMR0EDQQBRcewvz38Kz3r/xxqmKls=\n\n— alalanet.com/log MBaCUJiQgKVwXGezWrRXskcBNMerUlZPN85hUkBTGxV8Yo4RlFgzqqSNc6Xc2URVmKVqjnWjH+aL1M22NzpAhws8UQM=\n"
  },
  "log_origin": "alalanet.com/log",
  "log_key": "alalanet.com/log+30168250+ASxEHGmJwVcvJrYDlX9Vsj1vsVQGoQiF5jmtSxSIRZ1t",
  "server_pubkey": "95ac63a6f99ce221d67af2ab5fe203d3650ee8bac486fe22e01ae74809a41ce2",
  "signer": "95ac63a6f99ce221d67af2ab5fe203d3650ee8bac486fe22e01ae74809a41ce2",
  "how_to_verify": "1) check the Nostr signature of event_json (NIP-01) against signer (server_pubkey for alalanet statements, the agent's key for receipts); 2) leaf = SHA-256(0x00 || UTF-8 bytes of event_json); verify proof.hashes (base64) up to proof.root_hash (RFC 6962); 3) verify proof.checkpoint with log_key (C2SP signed note); tiles: /log/ (C2SP tlog-tiles)"
}