{
  "height": 127,
  "block_hash": "b1beddb370e5bf8f820fbe69196b49e25da1bbec37ce05f6ebb5fedeb9f1448a",
  "status": "confirmed",
  "bitcoin_block_height": 972999,
  "digest": {
    "alg": "sha256",
    "hex": "b1beddb370e5bf8f820fbe69196b49e25da1bbec37ce05f6ebb5fedeb9f1448a",
    "preimage": "block:{\"at\":\"2026-10-25T00:10:52.084Z\",\"entry_count\":1,\"first_seq\":130,\"height\":127,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":130,\"merkle_root\":\"cb56ab0a8ee42f91812ea231fcd48350839772cd0b15d11cc6d7328d0ae31491\",\"prev_hash\":\"48405edcf87a49fd72a9512a73495ff7c9448af488c16a7e4a58b91ec7308cbb\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:13:36.872Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add49b43bba591b9db34b694dbfbcd8eb6031a1f977b62e8d3e4f4e37c3b9e51e4ca0313120be74c1eb7337"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:13:36.872Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add49b3492399084d00daeb89ae6fd60739a5bea8266529b4c40197ca4b343c825f5c0b950c0c27f551bfd6"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:13:36.872Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add49b3be4560d76ad35f3b480123de579507a7b1ab981c8c08ce6f6ef70415c09b6e7be0dd49ccacec75d3"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/127/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."
}