Prague String Quartet
type: MusicGroup
genre: chamber music
genre: classical
popularity: 16
followers: 952
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdbf4ad88035e0f1ad9161a8583b3f9a289d45bf3f1117221ff552052a3ec93b8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953697
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953697
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/50cb7354-fd23-4da1-aa4f-345ab59334ba.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/50cb7354-fd23-4da1-aa4f-345ab59334ba.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/50cb7354-fd23-4da1-aa4f-345ab59334ba
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:49:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdbf4ad88035e0f1ad9161a8583b3f9a289d45bf3f1117221ff552052a3ec93b8","name":"Prague String Quartet","registered_at":"2026-06-14T12:59:42Z","symbol":"NIM0460478","token_address":"0x6123f11c2a770570dbb1fc15172a6ac9ed65c18b","type":"artist","uuid":"50cb7354-fd23-4da1-aa4f-345ab59334ba"}
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 0xdbf4ad88035e0f1ad9161a8583b3f9a289d45bf3f1117221ff552052a3ec93b8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50cb7354-fd23-4da1-aa4f-345ab59334ba.json and https://artists.proofprofile.net/proofs/artist/50cb7354-fd23-4da1-aa4f-345ab59334ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:49:28Z
  text: {"copyright_id":"0xdbf4ad88035e0f1ad9161a8583b3f9a289d45bf3f1117221ff552052a3ec93b8","name":"Prague String Quartet","registered_at":"2026-06-14T12:59:42Z","symbol":"NIM0460478","token_address":"0x6123f11c2a770570dbb1fc15172a6ac9ed65c18b","type":"artist","uuid":"50cb7354-fd23-4da1-aa4f-345ab59334ba"}
album: Hindemith, Honegger: String Quartet Nos. 2 & 3
  type: MusicAlbum
  date published: 1962
album: String Quartet No. 6 / String Quartet No. 3
  type: MusicAlbum
  date published: 1978
album: Tchaikovsky: String Quartet No. 1 - Borodin: String Quartet No. 2
  type: MusicAlbum
  date published: 2002-05-20
album: Tchaikovsky: String Quartet No. 1 in D major, Op.11, Borodin: String Quartet No. 2 in D major
  type: MusicAlbum
  date published: 2002-05-20
album: Borodin, Glinka: String Quartets
  type: MusicAlbum
  date published: 2012-04-30