Laurence Dreyfus
type: MusicGroup
description: Laurence Dreyfus, FBA (born July 28, 1952) is an American musicologist and player of the viola da gamba who was University Lecturer and Fellow of Magdalen College, Oxford. Early life Dreyfus was born
popularity: 14
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x515b6cf0038f81236661e2458a838902471722435a65e8d0fe790c3398c2b3ae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953727
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953727
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9006e65f-16c8-4720-8935-6637c060040f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9006e65f-16c8-4720-8935-6637c060040f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9006e65f-16c8-4720-8935-6637c060040f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T02:33:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x515b6cf0038f81236661e2458a838902471722435a65e8d0fe790c3398c2b3ae","name":"Laurence Dreyfus","registered_at":"2026-06-14T19:35:58Z","symbol":"NIM0554993","token_address":"0x7a9e6efb6f3935dcbea7070c198a622ceb6a3804","type":"artist","uuid":"9006e65f-16c8-4720-8935-6637c060040f"}
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 0x515b6cf0038f81236661e2458a838902471722435a65e8d0fe790c3398c2b3ae. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9006e65f-16c8-4720-8935-6637c060040f.json and https://artists.proofprofile.net/proofs/artist/9006e65f-16c8-4720-8935-6637c060040f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T02:33:01Z
  text: {"copyright_id":"0x515b6cf0038f81236661e2458a838902471722435a65e8d0fe790c3398c2b3ae","name":"Laurence Dreyfus","registered_at":"2026-06-14T19:35:58Z","symbol":"NIM0554993","token_address":"0x7a9e6efb6f3935dcbea7070c198a622ceb6a3804","type":"artist","uuid":"9006e65f-16c8-4720-8935-6637c060040f"}
album: Sonatas for Viola da Gamba and Harpsicord, Bwv 1027 - 1029
  type: MusicAlbum
  date published: 1995
album: Rameau: Pièces De Clavecin En Concerts
  type: MusicAlbum
  date published: 1993