{
  "checkpoint": {
    "kind": "arc-registry-checkpoint",
    "key_id": "arc-registry-checkpoint-1",
    "head": "420a81f49953d78d0f1113094a5ac0fc15fca5705f7b804f24fb553e3331c8b7",
    "entries": 3,
    "ledger_sha256": "a65c22670dddf882ca0821b21a87bad5d694776965b0c12cfc3815bf7f694823",
    "feed_sha256": "568827c1e51dbac0ae3204bec20ae6689965141a20520efb7b0b41f62bbbb4f6",
    "nodes_sha256": "3ce3037d675ea6568c20bb8d0c47ac4998045060810aa0851f4467dce24e639a",
    "prev_checkpoint_sha256": "9d11e2be8b0ea0fdcc04cb0c7fd08b8356e546ddee25a35509260df0ee71d80a",
    "published_at": "2026-10-17T21:31:13.322Z"
  },
  "signature": "ALQzRinOZuC7yx1STAhxRFANbMZw4aFQ1dqCC0mEC1vZAjxUOtmrTQs6ukTZfHNhHcg4ZsN4XVib4QGuDV2SAQ==",
  "signer": {
    "key_id": "arc-registry-checkpoint-1",
    "fingerprint": "3e89c1a41c47211ff4cdacb3b578d2fb8c1d97328f55aeb5d521495eed3bc8a5",
    "public_key_file": "checkpoint-pubkey.pem"
  },
  "verify": "Recompute the SHA-256 digests of registry-ledger.jsonl, registry-feed.json, and nodes.json; check the head and entry count against the ledger; then verify the Ed25519 signature over the canonical checkpoint (recursively key-sorted JSON) with checkpoint-pubkey.pem. verify-checkpoint.mjs performs all of this."
}