Petr Messiereur
type: MusicGroup
genre: chamber music
genre: classical piano
popularity: 2
followers: 43
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc6e2cb09758ca10988cbbc8e140a78d220540c3b97d6f01bbb00cb3d1a4bfe43
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3c03dba-c119-41d7-84b1-9a91c63e85ea.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3c03dba-c119-41d7-84b1-9a91c63e85ea.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a3c03dba-c119-41d7-84b1-9a91c63e85ea
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc6e2cb09758ca10988cbbc8e140a78d220540c3b97d6f01bbb00cb3d1a4bfe43","name":"Petr Messiereur","registered_at":"2026-06-20T06:47:11Z","symbol":"NIM1545131","token_address":"0x7cba1ba3e25c4b9fc64dd90e4c0bf47eee5b09b7","type":"artist","uuid":"a3c03dba-c119-41d7-84b1-9a91c63e85ea"}
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 0xc6e2cb09758ca10988cbbc8e140a78d220540c3b97d6f01bbb00cb3d1a4bfe43. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3c03dba-c119-41d7-84b1-9a91c63e85ea.json and https://artists.proofprofile.net/proofs/artist/a3c03dba-c119-41d7-84b1-9a91c63e85ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0xc6e2cb09758ca10988cbbc8e140a78d220540c3b97d6f01bbb00cb3d1a4bfe43","name":"Petr Messiereur","registered_at":"2026-06-20T06:47:11Z","symbol":"NIM1545131","token_address":"0x7cba1ba3e25c4b9fc64dd90e4c0bf47eee5b09b7","type":"artist","uuid":"a3c03dba-c119-41d7-84b1-9a91c63e85ea"}
album: Lubomír Železný Violin Concerto, Štěpán Lucký Cello Concerto
  type: MusicAlbum
  date published: 1978
album: Stravinsky, Webern, Hindemith, Schönberg: Violin Compositions
  type: MusicAlbum
  date published: 2024-08-02