Willem Gribnau
type: MusicGroup
popularity: 2
followers: 184
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2e86a95da767a653cba2a3dda8bd6d30737bbd40596d196a114cc6f366a58348
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f7a9da1e-a0ca-4fe0-b140-b99c523f05ee.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f7a9da1e-a0ca-4fe0-b140-b99c523f05ee.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f7a9da1e-a0ca-4fe0-b140-b99c523f05ee
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2e86a95da767a653cba2a3dda8bd6d30737bbd40596d196a114cc6f366a58348","name":"Willem Gribnau","registered_at":"2026-06-21T15:36:17Z","symbol":"NIM1961369","token_address":"0x02600f1cf91cb8bb1c55350c1a75613f14327b8f","type":"artist","uuid":"f7a9da1e-a0ca-4fe0-b140-b99c523f05ee"}
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 0x2e86a95da767a653cba2a3dda8bd6d30737bbd40596d196a114cc6f366a58348. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7a9da1e-a0ca-4fe0-b140-b99c523f05ee.json and https://artists.proofprofile.net/proofs/artist/f7a9da1e-a0ca-4fe0-b140-b99c523f05ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0x2e86a95da767a653cba2a3dda8bd6d30737bbd40596d196a114cc6f366a58348","name":"Willem Gribnau","registered_at":"2026-06-21T15:36:17Z","symbol":"NIM1961369","token_address":"0x02600f1cf91cb8bb1c55350c1a75613f14327b8f","type":"artist","uuid":"f7a9da1e-a0ca-4fe0-b140-b99c523f05ee"}
album: The Life EP
  type: MusicAlbum
  date published: 2024-08-21
album: Don't Stop
  type: MusicAlbum
  date published: 2024-11-08