{
  "per_version": "1.0",
  "chain": "ARIV",
  "hash_alg": "SHA-256",
  "construction": "entry_hash = SHA-256( canonical_json(record) || prev_hash )",
  "note": "Sanitized sample Power Event Record. Canonical JSON = keys sorted ascending, no whitespace, UTF-8. Recompute the hash to verify the chain entry yourself.",
  "verdict": {
    "approved": true,
    "safe": true,
    "auditable": true,
    "financially_real": true
  },
  "telemetry": {
    "power_before_w": 949,
    "power_after_w": 581,
    "delta_pct": "38.8",
    "util_before_pct": "93.9",
    "util_after_pct": "95.7",
    "source": "NVML/DCGM snapshot — 8-GPU B200 A/B, ~3 min run",
    "caveat": "Validation evidence from a single short run, not a guaranteed savings figure. See methodology.html."
  },
  "policy": {
    "policy_id": "pol-fac-curtail-007",
    "authority": "FACILITY_DR_WINDOW",
    "reference": "Utility DR signal 2026-06-14T09:13Z"
  },
  "record": {
    "seq": 14820,
    "timestamp": "2026-06-14T09:14:02.118Z",
    "device": "gpu-node-07:b200:3",
    "path": "POLICY_APPROVAL_GATE",
    "action": "SET_POWER_LIMIT",
    "requested_w": 350,
    "enforced_w": 300,
    "readback_w": 300,
    "delta_w": 0
  },
  "prev_hash": "466679175c86dd829d1b56c9b2dd9c8d61ec1107972462f19c5a8bee857904ec",
  "entry_hash": "567a0163c0a83aedebf0b8c861dfcef3402ab7039e41210ea374bb8c463f6fc1"
}