Orford String Quartet
type: MusicGroup
genre: chamber music
description: The Orford String Quartet was a Canadian string quartet active from 1965 through 1991. They came to be the leading string quartet in Canada, and were well-known internationally. Founding In 1951, Gi
popularity: 6
followers: 157
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xc67887fd6aca4832b31f78d0ff2ac4bb5b5013c376a4c83f818c0312910c629b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954573
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954573
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b56795a2-0dd1-4427-a7e6-03fdc433a56e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b56795a2-0dd1-4427-a7e6-03fdc433a56e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b56795a2-0dd1-4427-a7e6-03fdc433a56e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T15:45:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc67887fd6aca4832b31f78d0ff2ac4bb5b5013c376a4c83f818c0312910c629b","name":"Orford String Quartet","registered_at":"2026-06-20T14:14:26Z","symbol":"NIM1628927","token_address":"0x49e7fc9537fa913bc76f377c7c88b3bb27c67642","type":"artist","uuid":"b56795a2-0dd1-4427-a7e6-03fdc433a56e"}
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 0xc67887fd6aca4832b31f78d0ff2ac4bb5b5013c376a4c83f818c0312910c629b. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b56795a2-0dd1-4427-a7e6-03fdc433a56e.json and https://artists.proofprofile.net/proofs/artist/b56795a2-0dd1-4427-a7e6-03fdc433a56e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T15:45:29Z
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album: Beethoven / Ravel: String Quartets
  type: MusicAlbum
  date published: 2000-01-01
album: Beethoven / Ravel: String Quartets
  type: MusicAlbum
  date published: 2000-01-01
album: Mozart / Weber: Clarinet Quintets
  type: MusicAlbum
  date published: 2008-01-01