{
  "schema_version": 1,
  "title": "Plan A Track 3 audit-chain data model",
  "semantics": "Schema-only research infrastructure. Empty, unknown, and unavailable fields are not evidence of absence.",
  "entities": {
    "compute_batch": {
      "purpose": "Track a quantity of AI-relevant compute through production and custody.",
      "fields": [
        "batch_id",
        "chip_type",
        "quantity",
        "production_date",
        "producer",
        "source",
        "status"
      ]
    },
    "sale_event": {
      "purpose": "Preserve a seller-to-buyer compute transaction or publisher record.",
      "fields": [
        "sale_id",
        "seller",
        "buyer",
        "date",
        "chip_type",
        "quantity",
        "destination",
        "source_url",
        "source_kind",
        "raw_value",
        "normalized_value"
      ]
    },
    "transfer_event": {
      "purpose": "Preserve resale, transfer, lease, loan, return, or other custody transition.",
      "fields": [
        "transfer_id",
        "from_entity",
        "to_entity",
        "date",
        "event_type",
        "chip_type",
        "quantity",
        "source_url",
        "basis"
      ]
    },
    "inventory_record": {
      "purpose": "Reconcile received, retained, transferred, and retired compute.",
      "fields": [
        "inventory_id",
        "entity",
        "observed_on",
        "chip_type",
        "received",
        "on_hand",
        "outbound",
        "retired",
        "source_url"
      ]
    },
    "inspection_event": {
      "purpose": "Record physical inspection of current compute holdings.",
      "fields": [
        "inspection_id",
        "entity",
        "location",
        "observed_on",
        "inspector",
        "quantity_inspected",
        "evidence_url",
        "scope"
      ]
    },
    "serial_observation": {
      "purpose": "Record serial numbers observed during physical inspection where disclosure is lawful.",
      "fields": [
        "inspection_id",
        "serial_number",
        "chip_type",
        "observed_on",
        "location",
        "status"
      ]
    },
    "decommission_event": {
      "purpose": "Record claimed or verified destruction/recycling/retirement.",
      "fields": [
        "decommission_id",
        "entity",
        "chip_type",
        "quantity",
        "date",
        "event_type",
        "recycler",
        "witness",
        "serial_basis",
        "source_url",
        "verification_status"
      ]
    },
    "sample_trace": {
      "purpose": "Record a reproducible sample of compute and each custody hop until physical verification or failure.",
      "fields": [
        "trace_id",
        "sample_id",
        "source_population",
        "sampling_rule",
        "random_seed",
        "selected_quantity",
        "hops",
        "terminal_state",
        "failure_reason"
      ]
    },
    "untraced_pool_entry": {
      "purpose": "Record compute that cannot be traced or whose retirement cannot be verified.",
      "fields": [
        "entry_id",
        "source_event",
        "quantity",
        "reason",
        "date",
        "review_state",
        "supporting_evidence"
      ]
    },
    "disclosure_event": {
      "purpose": "Record voluntary disclosure, amnesty, buyback, or similar location information.",
      "fields": [
        "disclosure_id",
        "entity",
        "quantity",
        "chip_type",
        "claimed_origin",
        "claimed_location",
        "date",
        "program",
        "verification_status",
        "source_url"
      ]
    }
  },
  "controlled_values": {
    "custody_events": [
      "PURCHASE",
      "RESALE",
      "TRANSFER",
      "LEASE",
      "LOAN",
      "INVENTORY",
      "DEPLOYMENT",
      "RETURN",
      "DECOMMISSION",
      "RECYCLE"
    ],
    "trace_terminal_states": [
      "PHYSICAL_INSPECTION",
      "TRACE_FAILURE",
      "UNVERIFIABLE_DECOMMISSIONING",
      "UNAUDITABLE_COUNTERPARTY"
    ],
    "evidence_states": [
      "VERIFIED_SITE_SPECIFIC",
      "SITE_LEVEL_EVIDENCE",
      "PENDING_RESEARCH",
      "SOURCE_AVAILABLE_NOT_INGESTED",
      "NOT_INGESTED",
      "UNKNOWN",
      "INGESTED_SNAPSHOT",
      "NOT_ASSESSED"
    ]
  }
}