Robbert de Nijs
type: MusicGroup
genre: nederpop
popularity: 11
followers: 31
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd83ce9d646840fd4edafc93e824c43f7ca5e075768f735dc9416b9afcdb6216d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953741
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953741
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f30e851-4fa2-4ed2-a7a9-05118482ff79.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f30e851-4fa2-4ed2-a7a9-05118482ff79.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9f30e851-4fa2-4ed2-a7a9-05118482ff79
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T04:44:49Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd83ce9d646840fd4edafc93e824c43f7ca5e075768f735dc9416b9afcdb6216d","name":"Robbert de Nijs","registered_at":"2026-06-14T21:13:17Z","symbol":"NIM0578185","token_address":"0x78dec6bfafe8300fea3b3eaf23b20e2d72ec798d","type":"artist","uuid":"9f30e851-4fa2-4ed2-a7a9-05118482ff79"}
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 0xd83ce9d646840fd4edafc93e824c43f7ca5e075768f735dc9416b9afcdb6216d. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f30e851-4fa2-4ed2-a7a9-05118482ff79.json and https://artists.proofprofile.net/proofs/artist/9f30e851-4fa2-4ed2-a7a9-05118482ff79.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T04:44:49Z
  text: {"copyright_id":"0xd83ce9d646840fd4edafc93e824c43f7ca5e075768f735dc9416b9afcdb6216d","name":"Robbert de Nijs","registered_at":"2026-06-14T21:13:17Z","symbol":"NIM0578185","token_address":"0x78dec6bfafe8300fea3b3eaf23b20e2d72ec798d","type":"artist","uuid":"9f30e851-4fa2-4ed2-a7a9-05118482ff79"}