{
  "height": 102,
  "block_hash": "4508207d396fc1a07683de2cc401ca37a82b600016575cf59e5d4ed382ddbfdd",
  "status": "confirmed",
  "bitcoin_block_height": 972982,
  "digest": {
    "alg": "sha256",
    "hex": "4508207d396fc1a07683de2cc401ca37a82b600016575cf59e5d4ed382ddbfdd",
    "preimage": "block:{\"at\":\"2026-10-24T22:02:52.600Z\",\"entry_count\":1,\"first_seq\":105,\"height\":102,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":105,\"merkle_root\":\"d85359b329d512e703991bf0996997f0aaf947bf2c4e911c8bd7d836cfce391d\",\"prev_hash\":\"837153e7d48fc6f51f8534b60b72b1ec1b023bac32b66f1627abc0b999442407\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:07:22.443Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972982,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add2c1b40bb53cca620a90b51b260551e2021ac60f3614b9cf67785be1e27ec09584c118969e4662e12f7e0"
        },
        {
          "type": "bitcoin",
          "block_height": 972982,
          "merkle_root": "4c99dddccb05ff6394193624edeedc186bccaa073a9bcae6d83f1f485bcee966"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:07:22.443Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972982,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add2c1b5f8cae0779a30d1dc8a3c371cea4f77d459f02311159ad257e2ee3b08a5893f54b96ce127a040abe"
        },
        {
          "type": "bitcoin",
          "block_height": 972982,
          "merkle_root": "4c99dddccb05ff6394193624edeedc186bccaa073a9bcae6d83f1f485bcee966"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:07:22.443Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add2c1b26f44ea62eec2b396a46851c61183f19e1fce3dea53495bcfb2b1bcbd262c29accb4ad67f41db93c"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/102/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."
}