Jan en zijn Harrys
type: MusicGroup
genre: polka
popularity: 3
followers: 25
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcbfc3c031cee136c3beded5475995051b60f2c3e2e0e97785ce308e4f4237ccb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953903
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953903
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1588b866-59c7-4f2c-8496-36c1ed2e3c00.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1588b866-59c7-4f2c-8496-36c1ed2e3c00.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1588b866-59c7-4f2c-8496-36c1ed2e3c00
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:05:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcbfc3c031cee136c3beded5475995051b60f2c3e2e0e97785ce308e4f4237ccb","name":"Jan en zijn Harrys","registered_at":"2026-06-15T20:56:17Z","symbol":"NIM0829533","token_address":"0x34846d2dc9842c7803b1056841d98d2330aef128","type":"artist","uuid":"1588b866-59c7-4f2c-8496-36c1ed2e3c00"}
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 0xcbfc3c031cee136c3beded5475995051b60f2c3e2e0e97785ce308e4f4237ccb. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1588b866-59c7-4f2c-8496-36c1ed2e3c00.json and https://artists.proofprofile.net/proofs/artist/1588b866-59c7-4f2c-8496-36c1ed2e3c00.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:05:05Z
  text: {"copyright_id":"0xcbfc3c031cee136c3beded5475995051b60f2c3e2e0e97785ce308e4f4237ccb","name":"Jan en zijn Harrys","registered_at":"2026-06-15T20:56:17Z","symbol":"NIM0829533","token_address":"0x34846d2dc9842c7803b1056841d98d2330aef128","type":"artist","uuid":"1588b866-59c7-4f2c-8496-36c1ed2e3c00"}