Prague Chamber Choir
type: MusicGroup
description: The Prague Chamber Choir (Pražský komorní sbor) is a Czech choir founded in Prague in 1990 by singers of the Prague Philharmonic Choir. It has performed concerts in Australia, Brazil, Israel, Japan, L
popularity: 16
followers: 300
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5255be81da20dbcf7071b7f5524e5a8cf4571af49c751d4092c64b39ef8e90ad
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953758
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953758
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b349824e-a11a-4da0-a28f-e884d49f49d2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b349824e-a11a-4da0-a28f-e884d49f49d2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b349824e-a11a-4da0-a28f-e884d49f49d2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T07:48:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5255be81da20dbcf7071b7f5524e5a8cf4571af49c751d4092c64b39ef8e90ad","name":"Prague Chamber Choir","registered_at":"2026-06-14T23:22:40Z","symbol":"NIM0609068","token_address":"0x7169c12c87eec0f6af47778d63cdbb143b998e81","type":"artist","uuid":"b349824e-a11a-4da0-a28f-e884d49f49d2"}
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 0x5255be81da20dbcf7071b7f5524e5a8cf4571af49c751d4092c64b39ef8e90ad. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b349824e-a11a-4da0-a28f-e884d49f49d2.json and https://artists.proofprofile.net/proofs/artist/b349824e-a11a-4da0-a28f-e884d49f49d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T07:48:25Z
  text: {"copyright_id":"0x5255be81da20dbcf7071b7f5524e5a8cf4571af49c751d4092c64b39ef8e90ad","name":"Prague Chamber Choir","registered_at":"2026-06-14T23:22:40Z","symbol":"NIM0609068","token_address":"0x7169c12c87eec0f6af47778d63cdbb143b998e81","type":"artist","uuid":"b349824e-a11a-4da0-a28f-e884d49f49d2"}
album: Vivaldi: Nisi Dominus & Stabat Mater
  type: MusicAlbum
  date published: 2007
album: Schubert: Mass No. 3 In B-Flat Major and Mass No. 4 In C Major
  type: MusicAlbum
  date published: 2007