Mack Rice
type: MusicGroup
description: Bonny "Mack" Rice (November 10, 1933 – June 27, 2016), sometimes credited as Sir Mack Rice, was an American songwriter and singer. His best-known composition and biggest hit as a solo performer was "M
popularity: 13
followers: 462
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5bf00d933c2583a29735a1b5471cd1cc232ecfaf32a65ea60c83abff780c569b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953778
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953778
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d3dfd43d-b79e-4389-b1bb-b415c31c000e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d3dfd43d-b79e-4389-b1bb-b415c31c000e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d3dfd43d-b79e-4389-b1bb-b415c31c000e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:57:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5bf00d933c2583a29735a1b5471cd1cc232ecfaf32a65ea60c83abff780c569b","name":"Mack Rice","registered_at":"2026-06-15T02:49:07Z","symbol":"NIM0658392","token_address":"0x3a2b6cc45ac1ab844bb5e02afa3cda9e24858eb7","type":"artist","uuid":"d3dfd43d-b79e-4389-b1bb-b415c31c000e"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf00d933c2583a29735a1b5471cd1cc232ecfaf32a65ea60c83abff780c569b. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3dfd43d-b79e-4389-b1bb-b415c31c000e.json and https://artists.proofprofile.net/proofs/artist/d3dfd43d-b79e-4389-b1bb-b415c31c000e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T12:02:32Z
  text: {"copyright_id":"0x5bf00d933c2583a29735a1b5471cd1cc232ecfaf32a65ea60c83abff780c569b","name":"Mack Rice","registered_at":"2026-06-15T02:49:07Z","symbol":"NIM0658392","token_address":"0x3a2b6cc45ac1ab844bb5e02afa3cda9e24858eb7","type":"artist","uuid":"d3dfd43d-b79e-4389-b1bb-b415c31c000e"}