Jan Harbeck
type: MusicGroup
description: thumb|right|260px|Jan Harbeck in Aarhus Jan Harbeck (born 13 April 1975) is a Danish jazz musician (saxophones, flaute, clarinet) and composer. Biography Harbeck attended the Royal Academy of Musi
popularity: 6
followers: 87
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf7db906975889a7219876c3cddf89fc74d16ce23ebe0f0e552201e4f45aa20f8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cf7126c0-4072-48bd-b35f-b87a5257efdd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cf7126c0-4072-48bd-b35f-b87a5257efdd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cf7126c0-4072-48bd-b35f-b87a5257efdd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf7db906975889a7219876c3cddf89fc74d16ce23ebe0f0e552201e4f45aa20f8","name":"Jan Harbeck","registered_at":"2026-06-21T00:18:09Z","symbol":"NIM1759709","token_address":"0xcebb8f6ee1d75ec971b67f69bad6c5bcfe830a28","type":"artist","uuid":"cf7126c0-4072-48bd-b35f-b87a5257efdd"}
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 0xf7db906975889a7219876c3cddf89fc74d16ce23ebe0f0e552201e4f45aa20f8. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf7126c0-4072-48bd-b35f-b87a5257efdd.json and https://artists.proofprofile.net/proofs/artist/cf7126c0-4072-48bd-b35f-b87a5257efdd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0xf7db906975889a7219876c3cddf89fc74d16ce23ebe0f0e552201e4f45aa20f8","name":"Jan Harbeck","registered_at":"2026-06-21T00:18:09Z","symbol":"NIM1759709","token_address":"0xcebb8f6ee1d75ec971b67f69bad6c5bcfe830a28","type":"artist","uuid":"cf7126c0-4072-48bd-b35f-b87a5257efdd"}