{
    "timestamp": "2025-04-29T14:00:00Z",
    "target": "https://api.example.com/health",
    "status": "up",
    "http_status_code": 200,
    "latency_ms": 145,
    "error_message": null,
    "observer": {
      "address": "0xABCD1234EF567890ABCD1234EF567890ABCD1234",
      "country": "France",
      "region": "Île-de-France",
      "city": "Paris",
      "probe_version": "0.1"
    },
    "proof": {
      "hash": "0xf6bca29d0a21c12f45e8c415c8f97d7e5f9b5f4ea37b47f1fcf67f06ce5126e1",
      "signature": "0x3045022100b5a8e9..."
    },
    "version": "0.1"
  }