Prague Piano Duo
type: MusicGroup
popularity: 2
followers: 35
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1c56dae42da412a1323a5aeb5116c243a8c0ae08522b523d66ce418e14648e82
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953903
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953903
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/14663d05-b1d1-4b87-aa52-b016fd264c75.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/14663d05-b1d1-4b87-aa52-b016fd264c75.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/14663d05-b1d1-4b87-aa52-b016fd264c75
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:05:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1c56dae42da412a1323a5aeb5116c243a8c0ae08522b523d66ce418e14648e82","name":"Prague Piano Duo","registered_at":"2026-06-15T20:34:41Z","symbol":"NIM0824382","token_address":"0xe60949b0d5dabe690d2ce2227bc0f2923d7f2580","type":"artist","uuid":"14663d05-b1d1-4b87-aa52-b016fd264c75"}
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 0x1c56dae42da412a1323a5aeb5116c243a8c0ae08522b523d66ce418e14648e82. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14663d05-b1d1-4b87-aa52-b016fd264c75.json and https://artists.proofprofile.net/proofs/artist/14663d05-b1d1-4b87-aa52-b016fd264c75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x1c56dae42da412a1323a5aeb5116c243a8c0ae08522b523d66ce418e14648e82","name":"Prague Piano Duo","registered_at":"2026-06-15T20:34:41Z","symbol":"NIM0824382","token_address":"0xe60949b0d5dabe690d2ce2227bc0f2923d7f2580","type":"artist","uuid":"14663d05-b1d1-4b87-aa52-b016fd264c75"}
album: Jan Ladislav Dussek: Concerto for Two Pianos, Sonata for Two Fortepianos - Leopold Koželuh: Concerto for Piano Four Hands
  type: MusicAlbum
  date published: 2004-09-01
album: Antonín Dvořák & Pyotr Ilyich Tchaikovsky: Slavonic Serenades
  type: MusicAlbum
  date published: 2005-02-01