{
  "ledger": "IronBridge LAW-25 hash-chain",
  "spec": "append-only sha256 hash-chain; chainlink_row = sha256(canonical(row)); chainlink_prev = prior row chainlink_row",
  "chain_length": 13491,
  "head": {
    "seq": 13491,
    "ts": "2026-09-24T10:14:03.789Z",
    "status": "applied",
    "chainlink_prev": "9237b9281c4b58816d2eddc9ac472a8b47124cc1d9f93b593ba66831c972417b",
    "chainlink_row": "34bbc9330eac5ccd11c0ed950c9607d1407489ea74cb5879169c50fe9807f88c"
  },
  "window": {
    "from": 13472,
    "to": 13491,
    "checked": 20,
    "continuity_ok": true,
    "breaks": []
  },
  "rows": [
    {
      "seq": 13472,
      "ts": "2026-09-24T05:29:04.378Z",
      "status": "applied",
      "chainlink_prev": "17a6dadf4320ed5d0e16e1e3d36219ffa9d386ee4f32a8ca56be708911bb281f",
      "chainlink_row": "51bd6b7c018cdd702c2872432531a7e5f992bf3166b26be6a8e75c1b1a5039c1"
    },
    {
      "seq": 13473,
      "ts": "2026-09-24T05:44:04.988Z",
      "status": "applied",
      "chainlink_prev": "51bd6b7c018cdd702c2872432531a7e5f992bf3166b26be6a8e75c1b1a5039c1",
      "chainlink_row": "14ca945ef214025bd14fcb041aaa4923ae572d4d7ee18de9e4a6220fffbe87b5"
    },
    {
      "seq": 13474,
      "ts": "2026-09-24T05:59:04.686Z",
      "status": "applied",
      "chainlink_prev": "14ca945ef214025bd14fcb041aaa4923ae572d4d7ee18de9e4a6220fffbe87b5",
      "chainlink_row": "2bb0932312cd54a0f049c61cda66b237848c0599be26f209ad93e983a175914c"
    },
    {
      "seq": 13475,
      "ts": "2026-09-24T06:14:04.288Z",
      "status": "applied",
      "chainlink_prev": "2bb0932312cd54a0f049c61cda66b237848c0599be26f209ad93e983a175914c",
      "chainlink_row": "712ba63071085c25398b4829caf14eb4feedf665e6cb4b51d5e2ad4540df0ecb"
    },
    {
      "seq": 13476,
      "ts": "2026-09-24T06:29:04.680Z",
      "status": "applied",
      "chainlink_prev": "712ba63071085c25398b4829caf14eb4feedf665e6cb4b51d5e2ad4540df0ecb",
      "chainlink_row": "fd328eea55a5352b02f85c130ebb666c97ef32f18dab8d0941ff8420c11e130c"
    },
    {
      "seq": 13477,
      "ts": "2026-09-24T06:44:06.200Z",
      "status": "applied",
      "chainlink_prev": "fd328eea55a5352b02f85c130ebb666c97ef32f18dab8d0941ff8420c11e130c",
      "chainlink_row": "820d7581a1db2c9a3646744ab9d273286059b5014a3e197c9fa41a5f1c9aeac2"
    },
    {
      "seq": 13478,
      "ts": "2026-09-24T06:59:05.082Z",
      "status": "applied",
      "chainlink_prev": "820d7581a1db2c9a3646744ab9d273286059b5014a3e197c9fa41a5f1c9aeac2",
      "chainlink_row": "f9d30a258199ed9ea0b13a10843d7058c8b9f96716e752b06367d19da95302bb"
    },
    {
      "seq": 13479,
      "ts": "2026-09-24T07:14:03.379Z",
      "status": "applied",
      "chainlink_prev": "f9d30a258199ed9ea0b13a10843d7058c8b9f96716e752b06367d19da95302bb",
      "chainlink_row": "0f65385c81a9db5a1103ae8b73b6653e179c3fa3aa25b93afe3b49136b99895c"
    },
    {
      "seq": 13480,
      "ts": "2026-09-24T07:29:03.839Z",
      "status": "applied",
      "chainlink_prev": "0f65385c81a9db5a1103ae8b73b6653e179c3fa3aa25b93afe3b49136b99895c",
      "chainlink_row": "78d2931574e945aec510b8426e18228161d28bb4039370edbd9ea794d09e2e78"
    },
    {
      "seq": 13481,
      "ts": "2026-09-24T07:44:04.646Z",
      "status": "applied",
      "chainlink_prev": "78d2931574e945aec510b8426e18228161d28bb4039370edbd9ea794d09e2e78",
      "chainlink_row": "1f44911e340435497d57b851d76565998ccc25e2760b1b624ed1febd720a588c"
    },
    {
      "seq": 13482,
      "ts": "2026-09-24T07:59:04.406Z",
      "status": "applied",
      "chainlink_prev": "1f44911e340435497d57b851d76565998ccc25e2760b1b624ed1febd720a588c",
      "chainlink_row": "22d995b705920057f2835d49dd5d7e07e9ad61172a84efb5e969a735b2791223"
    },
    {
      "seq": 13483,
      "ts": "2026-09-24T08:14:03.522Z",
      "status": "applied",
      "chainlink_prev": "22d995b705920057f2835d49dd5d7e07e9ad61172a84efb5e969a735b2791223",
      "chainlink_row": "f2bcd55006bba29dfd0be151793c69f19b48c535e3d3a8aa02a8e5ed339863d4"
    },
    {
      "seq": 13484,
      "ts": "2026-09-24T08:29:04.540Z",
      "status": "applied",
      "chainlink_prev": "f2bcd55006bba29dfd0be151793c69f19b48c535e3d3a8aa02a8e5ed339863d4",
      "chainlink_row": "5ecfb2ae3e52a0a754ad92a7c43b05f248affd113d239385079531bc593ccef6"
    },
    {
      "seq": 13485,
      "ts": "2026-09-24T08:44:05.693Z",
      "status": "applied",
      "chainlink_prev": "5ecfb2ae3e52a0a754ad92a7c43b05f248affd113d239385079531bc593ccef6",
      "chainlink_row": "202b2af9c2b7b6484d305ec57a7f6a615782038d927d634e7e530d700bf289c2"
    },
    {
      "seq": 13486,
      "ts": "2026-09-24T08:59:03.788Z",
      "status": "applied",
      "chainlink_prev": "202b2af9c2b7b6484d305ec57a7f6a615782038d927d634e7e530d700bf289c2",
      "chainlink_row": "a904d2946d98c7168fd5465dac11c818cf90bab34116112d423476008646cec2"
    },
    {
      "seq": 13487,
      "ts": "2026-09-24T09:14:03.836Z",
      "status": "applied",
      "chainlink_prev": "a904d2946d98c7168fd5465dac11c818cf90bab34116112d423476008646cec2",
      "chainlink_row": "9ea07e3cc87cd8915c4793e0b6b6f21aaa012174fdb9085908cbdca3886d3b4f"
    },
    {
      "seq": 13488,
      "ts": "2026-09-24T09:29:04.014Z",
      "status": "applied",
      "chainlink_prev": "9ea07e3cc87cd8915c4793e0b6b6f21aaa012174fdb9085908cbdca3886d3b4f",
      "chainlink_row": "1f2ec9372b8c2637110447651abfac53e4a0e5b3bdaec1a41a021cdd8daa4419"
    },
    {
      "seq": 13489,
      "ts": "2026-09-24T09:44:05.489Z",
      "status": "applied",
      "chainlink_prev": "1f2ec9372b8c2637110447651abfac53e4a0e5b3bdaec1a41a021cdd8daa4419",
      "chainlink_row": "7762fb34adb6d5fecf73ff74dbd8201ec5800197a83102029a4e643562c309ba"
    },
    {
      "seq": 13490,
      "ts": "2026-09-24T09:59:04.421Z",
      "status": "applied",
      "chainlink_prev": "7762fb34adb6d5fecf73ff74dbd8201ec5800197a83102029a4e643562c309ba",
      "chainlink_row": "9237b9281c4b58816d2eddc9ac472a8b47124cc1d9f93b593ba66831c972417b"
    },
    {
      "seq": 13491,
      "ts": "2026-09-24T10:14:03.789Z",
      "status": "applied",
      "chainlink_prev": "9237b9281c4b58816d2eddc9ac472a8b47124cc1d9f93b593ba66831c972417b",
      "chainlink_row": "34bbc9330eac5ccd11c0ed950c9607d1407489ea74cb5879169c50fe9807f88c"
    }
  ],
  "how_to_verify": "For each row n: confirm rows[n].chainlink_prev === rows[n-1].chainlink_row. Any break = tamper. Spot-check any single row (with server-side leaf recompute) via ?row=N. Leaf contents withheld to protect internal operations; each row carries an HMAC authorship seal.",
  "authorship_seal": "HMAC (keyed) per row",
  "public_chains": 2,
  "sibling": {
    "name": "seal",
    "endpoint": "/api/chain/page"
  },
  "note": "two public chains that currently disagree; they are not the same ledger; v1 row=1 leaf_integrity is false"
}