{
  "event": {
    "kind": 4302,
    "id": "02e43dfa990964f8c1ee4fdf85296f09e072565dbca757c08a6d2aa9916e15a2",
    "pubkey": "95ac63a6f99ce221d67af2ab5fe203d3650ee8bac486fe22e01ae74809a41ce2",
    "created_at": 1793918494,
    "tags": [
      [
        "d",
        "rakz3tkuo3qffazs"
      ],
      [
        "r",
        "https://api.exa.ai/contents"
      ],
      [
        "proto",
        "x402"
      ],
      [
        "alt",
        "alalanet service attestation (transition)"
      ],
      [
        "status",
        "up"
      ]
    ],
    "content": "{\"type\":\"transition\",\"service\":\"rakz3tkuo3qffazs\",\"url\":\"https://api.exa.ai/contents\",\"proto\":\"x402\",\"at\":1793918494,\"status\":\"up\",\"previous\":\"changed\",\"latency_ms\":209,\"http_code\":402,\"detail\":\"402 with valid terms; price 0 USDC, catalogue says 0.001 USDC (price may depend on the request)\",\"network\":\"eip155:8453\",\"asset\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"amount\":\"0\",\"pay_to\":\"0x6d6E695b09861467c7d462f5AAF31cF3540B9192\"}",
    "sig": "d39dfa25c436b97dab69ab6dd2ea6f37cc8216d4682624efd8293e1ea34cd301d7e21247aff216c77b899acd10cb03111b77c66150345416959a5c834ee5f4ab"
  },
  "event_json": "{\"kind\":4302,\"id\":\"02e43dfa990964f8c1ee4fdf85296f09e072565dbca757c08a6d2aa9916e15a2\",\"pubkey\":\"95ac63a6f99ce221d67af2ab5fe203d3650ee8bac486fe22e01ae74809a41ce2\",\"created_at\":1793918494,\"tags\":[[\"d\",\"rakz3tkuo3qffazs\"],[\"r\",\"https://api.exa.ai/contents\"],[\"proto\",\"x402\"],[\"alt\",\"alalanet service attestation (transition)\"],[\"status\",\"up\"]],\"content\":\"{\\\"type\\\":\\\"transition\\\",\\\"service\\\":\\\"rakz3tkuo3qffazs\\\",\\\"url\\\":\\\"https://api.exa.ai/contents\\\",\\\"proto\\\":\\\"x402\\\",\\\"at\\\":1793918494,\\\"status\\\":\\\"up\\\",\\\"previous\\\":\\\"changed\\\",\\\"latency_ms\\\":209,\\\"http_code\\\":402,\\\"detail\\\":\\\"402 with valid terms; price 0 USDC, catalogue says 0.001 USDC (price may depend on the request)\\\",\\\"network\\\":\\\"eip155:8453\\\",\\\"asset\\\":\\\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\\\",\\\"amount\\\":\\\"0\\\",\\\"pay_to\\\":\\\"0x6d6E695b09861467c7d462f5AAF31cF3540B9192\\\"}\",\"sig\":\"d39dfa25c436b97dab69ab6dd2ea6f37cc8216d4682624efd8293e1ea34cd301d7e21247aff216c77b899acd10cb03111b77c66150345416959a5c834ee5f4ab\"}",
  "log_index": 176,
  "proof": {
    "index": 176,
    "tree_size": 65590,
    "root_hash": "XV9UiWN4+fGw4l8tUKs0lxlUAi3fxLsAijwkwAVB8/g=",
    "leaf_hash": "0m/IY9UL+Zf6dklgXKo+/aHViYSiw9jJNgCq9iqGfxk=",
    "hashes": [
      "znL3uwAy37XwZH1MfySA3ue6qLTC7a4dVp8VxX8yTwI=",
      "+Th0oa6cLQjhIq1JYEFVW8NdcqLfKkUM2e9s+g/pJp0=",
      "waMYJEy5+Dlb4Q2bK5r3QSMPn5iIn0iY40tbX5vQ+FI=",
      "OYmrtwYvqBLkllzcWD+2Ad0iJieGZjRWRvokKRUFGxA=",
      "c23NC6uXuXT185Nu8n7Bi4iJ7f8di7uUrCKT2w2lNoA=",
      "eTLif4NQEW+mxaLt4AsgeC+ZnWimtCypHzRXjNWC1vs=",
      "hhx502kApgWbYDSpEOoSYRvtXg/c1TqJP4BLcUod7bE=",
      "F1A9vrXbuGDzpJDgzFSqQAtHeMcT13SmNVAVbVhZSTI=",
      "TblQn1zjKX38md033ldMEYWz3OwyH+8JqkYS79lk4G0=",
      "iVT5c3n6TIK5Hn018+MkYClE47aPIGvN2wL3EAGfcrQ=",
      "3d0tCBCI3LobtmITr11wfuWvJ4raIK53OZn4iy3UQ5c=",
      "7tXbpbBEpDblRQMQLcdvY8aBCbbAxFP7Dob1wbCdoIQ=",
      "NwOrLnxh84yImav6oYr8VjPQsd1mjsjbQuOGpsL3qCE=",
      "jvFNLsE7VJBGoHAXOcpdKXpzx/+Yj7QYaXObo1ji3Pw=",
      "tqnSvt9rtnyHSKvENqKC93TRm8fmqWJbriY4O9hDfTE=",
      "ESHnVflyNyyKu1DCnH3nBYuJsIsWtS+hr9G6Gbs8scA=",
      "tI94qiHEeC5Qfw1U58y7VPmmBQgLmpGr1IctBdcWWfA="
    ],
    "checkpoint": "alalanet.com/log\n65590\nXV9UiWN4+fGw4l8tUKs0lxlUAi3fxLsAijwkwAVB8/g=\n\n— alalanet.com/log MBaCUN40SGVte3mr0FJ/eUPWTcyp/QMh3qOIVvUjVYGnjlFAB2PJqf+pEEMcYF4mWqVR9WPMOta8Crp/qCGuleCyUwQ=\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)"
}