Mack Bertrand
type: MusicGroup
genre: rumba congolaise
popularity: 2
followers: 110
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6f55d7c2cbd1427020c92750fb97c7f7e006a5e54660ab3cba8b373902322278
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/999c423b-9056-43fa-a761-ffd7d22ef759.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/999c423b-9056-43fa-a761-ffd7d22ef759.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/999c423b-9056-43fa-a761-ffd7d22ef759
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6f55d7c2cbd1427020c92750fb97c7f7e006a5e54660ab3cba8b373902322278","name":"Mack Bertrand","registered_at":"2026-06-17T19:12:29Z","symbol":"NIM1491940","token_address":"0x202226d81bb7202a66da73ba63b8ed7f2bdb0aba","type":"artist","uuid":"999c423b-9056-43fa-a761-ffd7d22ef759"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55d7c2cbd1427020c92750fb97c7f7e006a5e54660ab3cba8b373902322278. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/999c423b-9056-43fa-a761-ffd7d22ef759.json and https://artists.proofprofile.net/proofs/artist/999c423b-9056-43fa-a761-ffd7d22ef759.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x6f55d7c2cbd1427020c92750fb97c7f7e006a5e54660ab3cba8b373902322278","name":"Mack Bertrand","registered_at":"2026-06-17T19:12:29Z","symbol":"NIM1491940","token_address":"0x202226d81bb7202a66da73ba63b8ed7f2bdb0aba","type":"artist","uuid":"999c423b-9056-43fa-a761-ffd7d22ef759"}
album: Live in Morlaix France
  type: MusicAlbum
  date published: 2021-11-30
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  type: MusicAlbum
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