John Mark Rozendaal
type: MusicGroup
genre: chamber music
popularity: 7
followers: 52
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7a441b74b2a3945dc3d5d8191f3519fdcde3ec428fb4b2cd6e82ceebca95bc90
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/b44c9b77-0bb2-46fa-9702-2064066f6e6c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b44c9b77-0bb2-46fa-9702-2064066f6e6c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b44c9b77-0bb2-46fa-9702-2064066f6e6c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T15:45:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7a441b74b2a3945dc3d5d8191f3519fdcde3ec428fb4b2cd6e82ceebca95bc90","name":"John Mark Rozendaal","registered_at":"2026-06-20T14:04:30Z","symbol":"NIM1627611","token_address":"0xfb8e3c241b9ffe2cc67ac8811453358ab005cc49","type":"artist","uuid":"b44c9b77-0bb2-46fa-9702-2064066f6e6c"}
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 0x7a441b74b2a3945dc3d5d8191f3519fdcde3ec428fb4b2cd6e82ceebca95bc90. 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/b44c9b77-0bb2-46fa-9702-2064066f6e6c.json and https://artists.proofprofile.net/proofs/artist/b44c9b77-0bb2-46fa-9702-2064066f6e6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T15:45:29Z
  text: {"copyright_id":"0x7a441b74b2a3945dc3d5d8191f3519fdcde3ec428fb4b2cd6e82ceebca95bc90","name":"John Mark Rozendaal","registered_at":"2026-06-20T14:04:30Z","symbol":"NIM1627611","token_address":"0xfb8e3c241b9ffe2cc67ac8811453358ab005cc49","type":"artist","uuid":"b44c9b77-0bb2-46fa-9702-2064066f6e6c"}
album: Viola Da Gamba Recital: Rozendaal, John Mark - Goodall, S. / Simpson, C. / Sumarte, R. / Younge, W.
  type: MusicAlbum
  date published: 2008-01-01
album: Viola Da Gamba Recital: Rozendaal, John Mark - Goodall, S. / Simpson, C. / Sumarte, R. / Younge, W.
  type: MusicAlbum
  date published: 2008-04-01