{
  "schema_version": "1.0",
  "export": {
    "tenant": "northridge.health",
    "tenant_id": "org_01HV9WX3PQ8CK6N5Z2T4M7Y0HD",
    "range": {
      "from": "2026-04-25T00:00:00.000Z",
      "to": "2026-04-25T23:59:59.999Z"
    },
    "exported_at": "2026-04-25T14:02:18.012Z",
    "exported_by": "auditor@acme-cpa.com",
    "entry_count": 4
  },
  "verification": {
    "algo": "ed25519",
    "public_key_pem": "-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEATG41E7NOJWqgUG6uAj7swmdSnZfPk6NCpwlx+nqGGt4=\n-----END PUBLIC KEY-----\n",
    "key_id": "key_01HV0F3JBA7Z2N8D5Q3R7V8M1C",
    "key_published_at": "2026-04-01T00:00:00.000Z",
    "chain_head_hash": "719bbcca5fae4092fc4bbb44a43d286f557a8eb8acf1b225fba8c4c081382771",
    "tsa_anchor_chain": [
      {
        "checkpoint_after_entry": 4,
        "tsa_url": "https://freetsa.org/tsr",
        "tsa_cacert_url": "https://freetsa.org/files/cacert.pem",
        "tsa_tsr_base64": 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        "anchored_data": "chain_head_hash",
        "anchored_at": "2026-05-21T02:15:12.473Z"
      }
    ],
    "instructions": "https://usehasp.com/trust/verify"
  },
  "entries": [
    {
      "seq": 1,
      "timestamp": "2026-04-25T14:02:11.847Z",
      "actor": {
        "type": "user",
        "id": "user_01HV9WY1FQ3K8M5N2T7P0R4S6X",
        "email": "dr.chen@northridge.health"
      },
      "action": "ai.chat.message",
      "resource": {
        "type": "ai_chat_session",
        "id": "chat_01HV9WY3FZ2K6N5M8T7P0R4S6X"
      },
      "metadata": {
        "model": "claude-sonnet-4-6",
        "input_tokens": 412,
        "phi_scan": {
          "engine": "hasp-phi-scan-v1",
          "categories_detected": ["NAME", "DATE_OF_BIRTH"],
          "redaction_count": 2,
          "action": "redact"
        }
      },
      "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
      "hash": "147e6f62570d90e41b6bce0e49503519d12fe65192d80eb44866325fab891bb8",
      "signature": "ed25519:uB+7S9vuo+eyvR0FEsmnNzUa9eT4tqQG0L7jtwz6Tz99cS1p8cpeJb0OQmOAG5C+5Xu3cuoM8v2B/FHWrzYcDQ=="
    },
    {
      "seq": 2,
      "timestamp": "2026-04-25T14:02:14.203Z",
      "actor": {
        "type": "user",
        "id": "user_01HV9WY1FQ3K8M5N2T7P0R4S6X",
        "email": "dr.chen@northridge.health"
      },
      "action": "ai.chat.response",
      "resource": {
        "type": "ai_chat_session",
        "id": "chat_01HV9WY3FZ2K6N5M8T7P0R4S6X"
      },
      "metadata": {
        "model": "claude-sonnet-4-6",
        "output_tokens": 287,
        "finish_reason": "stop"
      },
      "prev_hash": "147e6f62570d90e41b6bce0e49503519d12fe65192d80eb44866325fab891bb8",
      "hash": "2f8fac6b47a0b1a281578d895b4b2066cb69d8b0a59128ca24cd010976ceaf28",
      "signature": "ed25519:f/b6XPI3lYG7kzK8b9Y/u3o5j4FE7sDeF0H6QvwgzhdgMEb9dxms4o8nAf6ppwSxdbPonSNb8GxjWxkCAA78AA=="
    },
    {
      "seq": 3,
      "timestamp": "2026-04-25T14:08:42.501Z",
      "actor": {
        "type": "api_key",
        "id": "key_01HV9WZ2A3B4C5D6E7F8G9H0J1",
        "label": "ehr-bridge"
      },
      "action": "data.record.create",
      "resource": {
        "type": "app_entity_record",
        "id": "rec_01HV9X02M3N4P5Q6R7S8T9U0V1"
      },
      "metadata": {
        "entity": "encounter",
        "source_ip": "10.0.42.18"
      },
      "prev_hash": "2f8fac6b47a0b1a281578d895b4b2066cb69d8b0a59128ca24cd010976ceaf28",
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    },
    {
      "seq": 4,
      "timestamp": "2026-04-25T14:11:55.310Z",
      "actor": {
        "type": "user",
        "id": "user_01HV9X1B3C4D5E6F7G8H9J0K1L",
        "email": "compliance@northridge.health"
      },
      "action": "audit.export.request",
      "resource": {
        "type": "audit_export",
        "id": "exp_01HV9X2N3P4Q5R6S7T8U9V0W1X"
      },
      "metadata": {
        "range": "2026-04-25",
        "format": "json"
      },
      "prev_hash": "7a25d569bfbf87fb4c723ecc98c3baf368b8b04589281691958d5d8a75138c2a",
      "hash": "719bbcca5fae4092fc4bbb44a43d286f557a8eb8acf1b225fba8c4c081382771",
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    }
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}