Kees Vlak
type: MusicGroup
popularity: 6
followers: 182
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x39d6e845586926c93d70b7d8a5d3df1a4fc75ea929bd16671e37ec25d953abe3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9fbb29f-ad36-4eda-8263-c3f8e0db0251.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9fbb29f-ad36-4eda-8263-c3f8e0db0251.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b9fbb29f-ad36-4eda-8263-c3f8e0db0251
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x39d6e845586926c93d70b7d8a5d3df1a4fc75ea929bd16671e37ec25d953abe3","name":"Kees Vlak","registered_at":"2026-06-20T16:16:33Z","symbol":"NIM1652472","token_address":"0xbb101d053e7e884fcd8717d5e79cfc91959562f6","type":"artist","uuid":"b9fbb29f-ad36-4eda-8263-c3f8e0db0251"}
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 0x39d6e845586926c93d70b7d8a5d3df1a4fc75ea929bd16671e37ec25d953abe3. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9fbb29f-ad36-4eda-8263-c3f8e0db0251.json and https://artists.proofprofile.net/proofs/artist/b9fbb29f-ad36-4eda-8263-c3f8e0db0251.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:15:05Z
  text: {"copyright_id":"0x39d6e845586926c93d70b7d8a5d3df1a4fc75ea929bd16671e37ec25d953abe3","name":"Kees Vlak","registered_at":"2026-06-20T16:16:33Z","symbol":"NIM1652472","token_address":"0xbb101d053e7e884fcd8717d5e79cfc91959562f6","type":"artist","uuid":"b9fbb29f-ad36-4eda-8263-c3f8e0db0251"}
album: Concert Series 14: Kees Vlak Composer
  type: MusicAlbum
  date published: 1994-07-15