Geert Jan Kroon
type: MusicGroup
popularity: 2
followers: 80
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x20c3e59c1acf6cc3c87435bd741c63dc89058d4cda2daf89c1a2021a8e6a188a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc97a05f-41f2-40a5-9ad6-e611415537a7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc97a05f-41f2-40a5-9ad6-e611415537a7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bc97a05f-41f2-40a5-9ad6-e611415537a7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x20c3e59c1acf6cc3c87435bd741c63dc89058d4cda2daf89c1a2021a8e6a188a","name":"Geert Jan Kroon","registered_at":"2026-06-20T17:36:35Z","symbol":"NIM1669019","token_address":"0x7178d3e4796673eb80355b302287ade2c88f7f77","type":"artist","uuid":"bc97a05f-41f2-40a5-9ad6-e611415537a7"}
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 0x20c3e59c1acf6cc3c87435bd741c63dc89058d4cda2daf89c1a2021a8e6a188a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc97a05f-41f2-40a5-9ad6-e611415537a7.json and https://artists.proofprofile.net/proofs/artist/bc97a05f-41f2-40a5-9ad6-e611415537a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x20c3e59c1acf6cc3c87435bd741c63dc89058d4cda2daf89c1a2021a8e6a188a","name":"Geert Jan Kroon","registered_at":"2026-06-20T17:36:35Z","symbol":"NIM1669019","token_address":"0x7178d3e4796673eb80355b302287ade2c88f7f77","type":"artist","uuid":"bc97a05f-41f2-40a5-9ad6-e611415537a7"}
album: Where Words Fail
  type: MusicAlbum
  date published: 2019-11-08
album: Two Tides
  type: MusicAlbum
  date published: 2021-07-10
album: The Final Frontier
  type: MusicAlbum
  date published: 2021-10-19
album: Soaring the Sky
  type: MusicAlbum
  date published: 2023-02-13
album: Those Gazing Eyes
  type: MusicAlbum
  date published: 2023-05-19
album: Carols of Old
  type: MusicAlbum
  date published: 2023-11-10
album: The Unknown
  type: MusicAlbum
  date published: 2025-05-16