Matt Black
type: MusicGroup
popularity: 23
followers: 147
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfc969a267db920ab71ffebd2e238a1e89b1a22c8eed381b19a288e76f9226539
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9ed72d13-4b2a-4e2a-ab91-d089f12c0e6a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9ed72d13-4b2a-4e2a-ab91-d089f12c0e6a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9ed72d13-4b2a-4e2a-ab91-d089f12c0e6a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfc969a267db920ab71ffebd2e238a1e89b1a22c8eed381b19a288e76f9226539","name":"Matt Black","registered_at":"2026-06-12T05:49:51Z","symbol":"NIM0205609","token_address":"0x1a5a19c22e763877b2d1baad48163753a3286020","type":"artist","uuid":"9ed72d13-4b2a-4e2a-ab91-d089f12c0e6a"}
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 0xfc969a267db920ab71ffebd2e238a1e89b1a22c8eed381b19a288e76f9226539. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ed72d13-4b2a-4e2a-ab91-d089f12c0e6a.json and https://artists.proofprofile.net/proofs/artist/9ed72d13-4b2a-4e2a-ab91-d089f12c0e6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0xfc969a267db920ab71ffebd2e238a1e89b1a22c8eed381b19a288e76f9226539","name":"Matt Black","registered_at":"2026-06-12T05:49:51Z","symbol":"NIM0205609","token_address":"0x1a5a19c22e763877b2d1baad48163753a3286020","type":"artist","uuid":"9ed72d13-4b2a-4e2a-ab91-d089f12c0e6a"}