Jan Groenteman
type: MusicGroup
popularity: 37
followers: 419
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6ab7fd7164774a2d89a0ee982cdf51431c14c6b418c9ec731a99894fdc140bf8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4e5ffdc9-4285-4fca-823c-b164d0574e17.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4e5ffdc9-4285-4fca-823c-b164d0574e17.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4e5ffdc9-4285-4fca-823c-b164d0574e17
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6ab7fd7164774a2d89a0ee982cdf51431c14c6b418c9ec731a99894fdc140bf8","name":"Jan Groenteman","registered_at":"2026-06-11T19:37:25Z","symbol":"NIM0102448","token_address":"0x092b22e43aa75ccf0578e3bb4ef0c82589d8cad0","type":"artist","uuid":"4e5ffdc9-4285-4fca-823c-b164d0574e17"}
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 0x6ab7fd7164774a2d89a0ee982cdf51431c14c6b418c9ec731a99894fdc140bf8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e5ffdc9-4285-4fca-823c-b164d0574e17.json and https://artists.proofprofile.net/proofs/artist/4e5ffdc9-4285-4fca-823c-b164d0574e17.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x6ab7fd7164774a2d89a0ee982cdf51431c14c6b418c9ec731a99894fdc140bf8","name":"Jan Groenteman","registered_at":"2026-06-11T19:37:25Z","symbol":"NIM0102448","token_address":"0x092b22e43aa75ccf0578e3bb4ef0c82589d8cad0","type":"artist","uuid":"4e5ffdc9-4285-4fca-823c-b164d0574e17"}
album: You May Be Through With The Past
  type: MusicAlbum
  date published: 2019
album: Midnight
  type: MusicAlbum
  date published: 2019
album: Silent Afternoon
  type: MusicAlbum
  date published: 2019
album: Whispering
  type: MusicAlbum
  date published: 2019
album: Liedjes voor kinderen van Het Concertgebouw
  type: MusicAlbum
  date published: 2019-03-25
album: Quiet Deliberations
  type: MusicAlbum
  date published: 2021-11-12
album: The Feels
  type: MusicAlbum
  date published: 2022-07-08
album: Passing By
  type: MusicAlbum
  date published: 2022-10-21
album: Intentions
  type: MusicAlbum
  date published: 2023-01-01
album: Isle Waltz
  type: MusicAlbum
  date published: 2023-05-05
album: Mag het wat zachter
  type: MusicAlbum
  date published: 2024-05-03