{
  "height": 132,
  "block_hash": "ae33ad81bcca41dec5903c478f18b7b934049064417bf9e4f0011b2a26e96f59",
  "status": "confirmed",
  "bitcoin_block_height": 972999,
  "digest": {
    "alg": "sha256",
    "hex": "ae33ad81bcca41dec5903c478f18b7b934049064417bf9e4f0011b2a26e96f59",
    "preimage": "block:{\"at\":\"2026-10-25T00:36:17.615Z\",\"entry_count\":2,\"first_seq\":135,\"height\":132,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":136,\"merkle_root\":\"b5d4574bbe6dd59ba05f216735a211163cd0553a58a0be5999baa6726a4a3830\",\"prev_hash\":\"d24c29256e47c69b6d0d51ea1f29c9db7c9d046836f6efa131fecf62396cffb7\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:40:47.433Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add5010630cd3afc26a4a510b0cd8d97ee41c60e5cfa66707de0759d476e1826fc2692b6fce897c9266d2ad"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:40:47.433Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add5010139b27b4a1e54599bab1d19a187433d1cb26a37902b2240fc86b833b9b16a4c0ba1242b7f6a0dd6d"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:40:47.433Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add5010703660f3ada31a931b598e8e7333f60d3bb2d348a66ed28e4822a1e26a0b4258dc500c1321fdad15"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/132/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."
}