Marek Szlezer
type: MusicGroup
genre: classical piano
popularity: 7
followers: 251
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6792140efbfe73a3551828a35283d4b4fa64fa1516e818b9c49f7129fe4ac6e9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/803254a2-e88f-46d9-8619-1d04c7bdacba.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/803254a2-e88f-46d9-8619-1d04c7bdacba.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/803254a2-e88f-46d9-8619-1d04c7bdacba
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6792140efbfe73a3551828a35283d4b4fa64fa1516e818b9c49f7129fe4ac6e9","name":"Marek Szlezer","registered_at":"2026-06-17T10:22:00Z","symbol":"NIM1365432","token_address":"0xee534333d54abbdedb6a0cff2e0390a7dce1e363","type":"artist","uuid":"803254a2-e88f-46d9-8619-1d04c7bdacba"}
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 0x6792140efbfe73a3551828a35283d4b4fa64fa1516e818b9c49f7129fe4ac6e9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/803254a2-e88f-46d9-8619-1d04c7bdacba.json and https://artists.proofprofile.net/proofs/artist/803254a2-e88f-46d9-8619-1d04c7bdacba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x6792140efbfe73a3551828a35283d4b4fa64fa1516e818b9c49f7129fe4ac6e9","name":"Marek Szlezer","registered_at":"2026-06-17T10:22:00Z","symbol":"NIM1365432","token_address":"0xee534333d54abbdedb6a0cff2e0390a7dce1e363","type":"artist","uuid":"803254a2-e88f-46d9-8619-1d04c7bdacba"}
album: Krzysztof Meyer: Piano Works, Vol. 2
  type: MusicAlbum
  date published: 2015-08-07
album: Dedications, Works for Cello and Piano, Vol. 3
  type: MusicAlbum
  date published: 2023-07-21
album: Dedications
  type: MusicAlbum
  date published: 2014-09-02