Travnicek Quartet
type: MusicGroup
genre: chamber music
genre: classical
popularity: 2
followers: 120
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc466d76f9a95b1155678df45c8451bf10206c387b01cabc9356e098943c28ee2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f7933d94-4c1b-495f-926f-e6141810afbd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f7933d94-4c1b-495f-926f-e6141810afbd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f7933d94-4c1b-495f-926f-e6141810afbd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc466d76f9a95b1155678df45c8451bf10206c387b01cabc9356e098943c28ee2","name":"Travnicek Quartet","registered_at":"2026-06-21T15:56:43Z","symbol":"NIM1965033","token_address":"0xf7825968e3c3249372e95e3250b47404fff1ec14","type":"artist","uuid":"f7933d94-4c1b-495f-926f-e6141810afbd"}
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 0xc466d76f9a95b1155678df45c8451bf10206c387b01cabc9356e098943c28ee2. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7933d94-4c1b-495f-926f-e6141810afbd.json and https://artists.proofprofile.net/proofs/artist/f7933d94-4c1b-495f-926f-e6141810afbd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0xc466d76f9a95b1155678df45c8451bf10206c387b01cabc9356e098943c28ee2","name":"Travnicek Quartet","registered_at":"2026-06-21T15:56:43Z","symbol":"NIM1965033","token_address":"0xf7825968e3c3249372e95e3250b47404fff1ec14","type":"artist","uuid":"f7933d94-4c1b-495f-926f-e6141810afbd"}
album: Smetana: String Quartets No.1 & 2
  type: MusicAlbum
  date published: 2010-05-17