Bruce Boyce
type: MusicGroup
description: Bruce Boyce (1910 – 11 May 1996) was a prominent Canadian-born American baritone singer of opera, oratorio and lieder, who made his postwar career in Britain and became a professor at the Royal Academ
popularity: 2
followers: 18
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb0836b536c6c1a5c9c2e245484a5f4cfd795c6770da99f66b8da2f2db1562f37
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf805f8c-9b8d-4e23-8195-d53d487f7843.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf805f8c-9b8d-4e23-8195-d53d487f7843.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bf805f8c-9b8d-4e23-8195-d53d487f7843
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb0836b536c6c1a5c9c2e245484a5f4cfd795c6770da99f66b8da2f2db1562f37","name":"Bruce Boyce","registered_at":"2026-06-20T18:52:58Z","symbol":"NIM1683897","token_address":"0xaf9e262d0151d0938246d6f845ae13a877ea1fd0","type":"artist","uuid":"bf805f8c-9b8d-4e23-8195-d53d487f7843"}
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 0xb0836b536c6c1a5c9c2e245484a5f4cfd795c6770da99f66b8da2f2db1562f37. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf805f8c-9b8d-4e23-8195-d53d487f7843.json and https://artists.proofprofile.net/proofs/artist/bf805f8c-9b8d-4e23-8195-d53d487f7843.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0xb0836b536c6c1a5c9c2e245484a5f4cfd795c6770da99f66b8da2f2db1562f37","name":"Bruce Boyce","registered_at":"2026-06-20T18:52:58Z","symbol":"NIM1683897","token_address":"0xaf9e262d0151d0938246d6f845ae13a877ea1fd0","type":"artist","uuid":"bf805f8c-9b8d-4e23-8195-d53d487f7843"}
album: Georges Bizet: Djamileh
  type: MusicAlbum
  date published: 2014-01-21