{
  "height": 32,
  "block_hash": "c701a4a9f561a0a2c8782a7a62692bf58793d33ecd4eacb9739a0ee07297bed1",
  "status": "confirmed",
  "bitcoin_block_height": 974874,
  "digest": {
    "alg": "sha256",
    "hex": "c701a4a9f561a0a2c8782a7a62692bf58793d33ecd4eacb9739a0ee07297bed1",
    "preimage": "block:{\"at\":\"2026-11-07T00:29:14.313Z\",\"entry_count\":2,\"first_seq\":106,\"height\":32,\"key_id\":\"key_a521921c2ba20669\",\"last_seq\":107,\"merkle_root\":\"ae41382c9389e18b542fe82bcb00354d3049d953fbeba0f57647c2655025b6e6\",\"prev_hash\":\"a57457b6e050675c0b9f249c0acf26b2e2b863741e422aaf60b8b8e66562e656\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T00:38:43.455Z",
      "updated_at": "2026-11-07T02:38:43.467Z",
      "bitcoin_block_height": 974874,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6aee7314445b026035e09e60566e12ce22f3e50bb910ad467d5307c02daa4c819edbb32c9babc0e0a31478dd"
        },
        {
          "type": "bitcoin",
          "block_height": 974874,
          "merkle_root": "fa522f272a37cb03554d5be30f11a1564362627a0d248c198befb5a303c3a302"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T00:38:43.455Z",
      "updated_at": "2026-11-07T03:38:43.477Z",
      "bitcoin_block_height": 974877,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6aee7314e4ae4b7e84d2e5e17c53199c1c66de82789d2045508e3ed08cf8c7f4ac0196859aec4b15b989b7c4"
        },
        {
          "type": "bitcoin",
          "block_height": 974877,
          "merkle_root": "dee625f48434576e86df10e80f2912b1c31b96672232e47e103806c1faef5814"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-11-07T00:38:43.455Z",
      "updated_at": "2026-11-07T03:38:43.477Z",
      "bitcoin_block_height": 974877,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6aee731429ee57c11344ea9be5220e20aa14f531e2314af2ac6fab82f1947f29234cc67e28689ea1b6ba93f8"
        },
        {
          "type": "bitcoin",
          "block_height": 974877,
          "merkle_root": "dee625f48434576e86df10e80f2912b1c31b96672232e47e103806c1faef5814"
        }
      ]
    }
  ],
  "proof_url": "https://www.a2ally.com/v1/ledger/blocks/32/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."
}