Cambridge University Chamber Choir
type: MusicGroup
genre: choral
popularity: 15
followers: 451
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5625e1a58f2fbf6d03b6981c8f1a3e7d5bb0413438b8e2c8c95d51a2ebd2a310
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953687
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953687
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/66e7c54e-fdac-449d-841a-d83c7eff68b0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/66e7c54e-fdac-449d-841a-d83c7eff68b0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/66e7c54e-fdac-449d-841a-d83c7eff68b0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T20:19:15Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5625e1a58f2fbf6d03b6981c8f1a3e7d5bb0413438b8e2c8c95d51a2ebd2a310","name":"Cambridge University Chamber Choir","registered_at":"2026-06-14T15:19:28Z","symbol":"NIM0493836","token_address":"0xfb5cffd1ecd9b58493ab2c299c0fe9c11b6b2406","type":"artist","uuid":"66e7c54e-fdac-449d-841a-d83c7eff68b0"}
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 0x5625e1a58f2fbf6d03b6981c8f1a3e7d5bb0413438b8e2c8c95d51a2ebd2a310. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66e7c54e-fdac-449d-841a-d83c7eff68b0.json and https://artists.proofprofile.net/proofs/artist/66e7c54e-fdac-449d-841a-d83c7eff68b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T20:19:15Z
  text: {"copyright_id":"0x5625e1a58f2fbf6d03b6981c8f1a3e7d5bb0413438b8e2c8c95d51a2ebd2a310","name":"Cambridge University Chamber Choir","registered_at":"2026-06-14T15:19:28Z","symbol":"NIM0493836","token_address":"0xfb5cffd1ecd9b58493ab2c299c0fe9c11b6b2406","type":"artist","uuid":"66e7c54e-fdac-449d-841a-d83c7eff68b0"}
album: English Choral Music
  type: MusicAlbum
  date published: 2010-10-11
album: The Music of Christopher Tye
  type: MusicAlbum
  date published: 2012-01-01