{
  "height": 59,
  "block_hash": "9cb08193b643cbc3c18f48adb35ef3dad3b8c035442d835ad89ae353b6b809ab",
  "status": "confirmed",
  "bitcoin_block_height": 972968,
  "digest": {
    "alg": "sha256",
    "hex": "9cb08193b643cbc3c18f48adb35ef3dad3b8c035442d835ad89ae353b6b809ab",
    "preimage": "block:{\"at\":\"2026-10-24T18:26:02.218Z\",\"entry_count\":1,\"first_seq\":61,\"height\":59,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":61,\"merkle_root\":\"b52f8fba0c5ebdff609929584e8219af4f04654de2c1d7ca60b0f863b5edb5fb\",\"prev_hash\":\"179a86a5a202b84c1795fe439453608a3b7a609f23d2794feb1bfff1c6135cc3\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:30:31.668Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adcf949daee09e388ba878ea505abf068fb75f6b1d19f70d910667a1d45ad9c0a0c0641e25dad73200a077c"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:30:31.668Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adcf9495617509c25a63a5ecc0d3c5ec404b761a0bf157f9559ba54aa9b52bf9a787fe54134aa0efce9cba5"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:30:31.668Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adcf9496272cbaab593586341279cc037d4d6de05f9e8f928011ea1f4b3974e6a7122febdb4c658bcb8a77f"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/59/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."
}