Martha Cluver
type: MusicGroup
genre: avant-garde
genre: minimalism
popularity: 2
followers: 62
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x20bef16f90502068df225a0c47d7c7a321df6d2a5b5c26301e0b0b0536359b25
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e6748dc3-e32a-41e7-afea-c426f388a065.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e6748dc3-e32a-41e7-afea-c426f388a065.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e6748dc3-e32a-41e7-afea-c426f388a065
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x20bef16f90502068df225a0c47d7c7a321df6d2a5b5c26301e0b0b0536359b25","name":"Martha Cluver","registered_at":"2026-06-21T09:03:34Z","symbol":"NIM1883475","token_address":"0xe04aa1c54fc4591b583b11d1d135fd7e30066a7b","type":"artist","uuid":"e6748dc3-e32a-41e7-afea-c426f388a065"}
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 0x20bef16f90502068df225a0c47d7c7a321df6d2a5b5c26301e0b0b0536359b25. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6748dc3-e32a-41e7-afea-c426f388a065.json and https://artists.proofprofile.net/proofs/artist/e6748dc3-e32a-41e7-afea-c426f388a065.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x20bef16f90502068df225a0c47d7c7a321df6d2a5b5c26301e0b0b0536359b25","name":"Martha Cluver","registered_at":"2026-06-21T09:03:34Z","symbol":"NIM1883475","token_address":"0xe04aa1c54fc4591b583b11d1d135fd7e30066a7b","type":"artist","uuid":"e6748dc3-e32a-41e7-afea-c426f388a065"}
album: Feldman, Vol. 11: Orchestra
  type: MusicAlbum
  date published: 2011-10-24