21 Cubano
type: MusicGroup
popularity: 11
followers: 22
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1bd0d3a3321a97223685491f0a8f0c18465fb1224f8a87825704ad535eec54d0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953674
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953674
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59d721b1-fee2-4810-9cf1-d397494ffba8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59d721b1-fee2-4810-9cf1-d397494ffba8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/59d721b1-fee2-4810-9cf1-d397494ffba8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T19:07:16Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1bd0d3a3321a97223685491f0a8f0c18465fb1224f8a87825704ad535eec54d0","name":"21 Cubano","registered_at":"2026-06-14T13:56:04Z","symbol":"NIM0473925","token_address":"0x7cbea7e9600b9285ea8871d217187f79c6007ac2","type":"artist","uuid":"59d721b1-fee2-4810-9cf1-d397494ffba8"}
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 0x1bd0d3a3321a97223685491f0a8f0c18465fb1224f8a87825704ad535eec54d0. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59d721b1-fee2-4810-9cf1-d397494ffba8.json and https://artists.proofprofile.net/proofs/artist/59d721b1-fee2-4810-9cf1-d397494ffba8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T19:07:16Z
  text: {"copyright_id":"0x1bd0d3a3321a97223685491f0a8f0c18465fb1224f8a87825704ad535eec54d0","name":"21 Cubano","registered_at":"2026-06-14T13:56:04Z","symbol":"NIM0473925","token_address":"0x7cbea7e9600b9285ea8871d217187f79c6007ac2","type":"artist","uuid":"59d721b1-fee2-4810-9cf1-d397494ffba8"}
album: Placa
  type: MusicAlbum
  date published: 2024-10-24
album: Placa (Slowed)
  type: MusicAlbum
  date published: 2024-10-24
album: Placa (Sped up)
  type: MusicAlbum
  date published: 2024-10-24