Bartosz Cajler
type: MusicGroup
genre: choral
popularity: 2
followers: 11
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd9a6f67a9ac3a7667eb1b6c2083a03ecb7d8cbdf0c571fa053522a7df67f63d9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954573
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954573
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4a93256-5b82-4717-b55b-4e682645ad45.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4a93256-5b82-4717-b55b-4e682645ad45.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b4a93256-5b82-4717-b55b-4e682645ad45
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T15:45:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd9a6f67a9ac3a7667eb1b6c2083a03ecb7d8cbdf0c571fa053522a7df67f63d9","name":"Bartosz Cajler","registered_at":"2026-06-20T14:15:38Z","symbol":"NIM1629474","token_address":"0x996e4883cbb9f0fd1eb37fb30536ea507c58305c","type":"artist","uuid":"b4a93256-5b82-4717-b55b-4e682645ad45"}
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 0xd9a6f67a9ac3a7667eb1b6c2083a03ecb7d8cbdf0c571fa053522a7df67f63d9. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4a93256-5b82-4717-b55b-4e682645ad45.json and https://artists.proofprofile.net/proofs/artist/b4a93256-5b82-4717-b55b-4e682645ad45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T15:45:29Z
  text: {"copyright_id":"0xd9a6f67a9ac3a7667eb1b6c2083a03ecb7d8cbdf0c571fa053522a7df67f63d9","name":"Bartosz Cajler","registered_at":"2026-06-20T14:15:38Z","symbol":"NIM1629474","token_address":"0x996e4883cbb9f0fd1eb37fb30536ea507c58305c","type":"artist","uuid":"b4a93256-5b82-4717-b55b-4e682645ad45"}
album: A Spotless Rose: Nordic Christmas
  type: MusicAlbum
  date published: 2012-03-01