{
  "height": 148,
  "block_hash": "dcae96ce5739232e9ae4a93867110dab6c4151fafda4162e02657c5ef36d48c3",
  "status": "confirmed",
  "bitcoin_block_height": 973004,
  "digest": {
    "alg": "sha256",
    "hex": "dcae96ce5739232e9ae4a93867110dab6c4151fafda4162e02657c5ef36d48c3",
    "preimage": "block:{\"at\":\"2026-10-25T01:59:23.515Z\",\"entry_count\":2,\"first_seq\":167,\"height\":148,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":168,\"merkle_root\":\"1fb2d05cf710a529eef34c5d92eb340c0fd0488f74180c790e333b41f7ab8344\",\"prev_hash\":\"a6276c0c80e44678e5a2f33a89ce6621cded463e3e6650e4142819a947109bba\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T02:08:52.920Z",
      "updated_at": "2026-10-25T04:28:50.521Z",
      "bitcoin_block_height": 973004,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add64b592476fe642ed0d28381833ec2bcca43f835f4d02b496575fc15cf96a9009210fc9929f917c084f8d"
        },
        {
          "type": "bitcoin",
          "block_height": 973004,
          "merkle_root": "4a3f7a119a1ebb4b77ec97b4cda3bf4150b676bf9ce4334749bfe6839309701d"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T02:08:52.920Z",
      "updated_at": "2026-10-25T04:28:50.521Z",
      "bitcoin_block_height": 973004,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add64b51585d4fe046f450d30f4ad73df0859133bee0de826ca5ae71bded6e4a07f300b76bec0fa71de0bd3"
        },
        {
          "type": "bitcoin",
          "block_height": 973004,
          "merkle_root": "4a3f7a119a1ebb4b77ec97b4cda3bf4150b676bf9ce4334749bfe6839309701d"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T02:08:52.920Z",
      "updated_at": "2026-10-25T02:08:52.920Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add64b5ff2a7f31fdb767500198727d416c252958554171a90b0fc1d260bf1f7e7cefedd55ad9292266d256"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/148/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."
}