R. van Zalk
type: MusicGroup
popularity: 25
followers: 47
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x66800252c495e69d3fe55b89afc89b39283414170cfd16cdcd7da7b892f504db
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/361e56f5-366c-4118-baa2-3d3fe593391c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/361e56f5-366c-4118-baa2-3d3fe593391c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/361e56f5-366c-4118-baa2-3d3fe593391c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x66800252c495e69d3fe55b89afc89b39283414170cfd16cdcd7da7b892f504db","name":"R. van Zalk","registered_at":"2026-06-11T16:39:50Z","symbol":"NIM0070404","token_address":"0x29212e97ffd888356d604eddd7d6d0727a53d833","type":"artist","uuid":"361e56f5-366c-4118-baa2-3d3fe593391c"}
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 0x66800252c495e69d3fe55b89afc89b39283414170cfd16cdcd7da7b892f504db. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/361e56f5-366c-4118-baa2-3d3fe593391c.json and https://artists.proofprofile.net/proofs/artist/361e56f5-366c-4118-baa2-3d3fe593391c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x66800252c495e69d3fe55b89afc89b39283414170cfd16cdcd7da7b892f504db","name":"R. van Zalk","registered_at":"2026-06-11T16:39:50Z","symbol":"NIM0070404","token_address":"0x29212e97ffd888356d604eddd7d6d0727a53d833","type":"artist","uuid":"361e56f5-366c-4118-baa2-3d3fe593391c"}