Harold Verwoert
type: MusicGroup
popularity: 8
followers: 176
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x28ed12d1b0c7bcbbc87a4bc93ed1a2ee68d42695ff6111350a2213330acb37c1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d6835d29-0aad-4ce7-a390-21ea1832da6b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d6835d29-0aad-4ce7-a390-21ea1832da6b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d6835d29-0aad-4ce7-a390-21ea1832da6b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x28ed12d1b0c7bcbbc87a4bc93ed1a2ee68d42695ff6111350a2213330acb37c1","name":"Harold Verwoert","registered_at":"2026-06-21T03:12:13Z","symbol":"NIM1798519","token_address":"0xb02d8808ee3272ee10447be20f7dacaa30cad4ef","type":"artist","uuid":"d6835d29-0aad-4ce7-a390-21ea1832da6b"}
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 0x28ed12d1b0c7bcbbc87a4bc93ed1a2ee68d42695ff6111350a2213330acb37c1. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6835d29-0aad-4ce7-a390-21ea1832da6b.json and https://artists.proofprofile.net/proofs/artist/d6835d29-0aad-4ce7-a390-21ea1832da6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:36:58Z
  text: {"copyright_id":"0x28ed12d1b0c7bcbbc87a4bc93ed1a2ee68d42695ff6111350a2213330acb37c1","name":"Harold Verwoert","registered_at":"2026-06-21T03:12:13Z","symbol":"NIM1798519","token_address":"0xb02d8808ee3272ee10447be20f7dacaa30cad4ef","type":"artist","uuid":"d6835d29-0aad-4ce7-a390-21ea1832da6b"}
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