{
  "height": 166,
  "block_hash": "61756ba63fe6d57e58f4c30206550e6d17a34a1e3f8408a28b2375cf0828b784",
  "status": "pending",
  "bitcoin_block_height": null,
  "digest": {
    "alg": "sha256",
    "hex": "61756ba63fe6d57e58f4c30206550e6d17a34a1e3f8408a28b2375cf0828b784",
    "preimage": "block:{\"at\":\"2026-10-25T03:34:21.158Z\",\"entry_count\":2,\"first_seq\":204,\"height\":166,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":205,\"merkle_root\":\"1939b12233cadcc9244459496ad4945624881875e446b030edf6df91901ebf5d\",\"prev_hash\":\"e8352d113a6151816b04af398c511fdbd88d5a9da7f2d9870fcc8ba8df1eb742\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "pending",
      "submitted_at": "2026-10-25T03:38:50.514Z",
      "updated_at": "2026-10-25T03:38:50.514Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add79cc02c345ac8687b7a6bc1788b30f49f8e0a55844f377d928c1341a3c85b42cc9833c2d411a14067f65"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "pending",
      "submitted_at": "2026-10-25T03:38:50.514Z",
      "updated_at": "2026-10-25T03:38:50.514Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add79cb0c649a5cca38e2999a5d57c847f43b7d9d4c2c495f3410ed81632bbb1c8cb87f08b68f63209a08f4"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T03:38:50.514Z",
      "updated_at": "2026-10-25T03:38:50.514Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add79cc6acddd801bd4cfd951cab9dc01f1e7653ec8e8d48b45191ca907d9bd68243346778ac604f316b3f8"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/166/anchor.ots",
  "how_to_verify": "Download the .ots proof and run `ots verify -d <block_hash> <file>.ots` with the OpenTimestamps client, which checks the Bitcoin attestation against Bitcoin block headers. The digest is the block hash: sha256 of digest.preimage, the text \"block:\" followed by the canonical block header, which is the same header the issuer signs."
}