Libor Ježek
type: MusicGroup
popularity: 29
followers: 18
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa5d75a731cc4fb25af1419005f0eff344b080da4a274bc3637dd54443a8c05e5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/55fe6eea-e52e-46c0-9ad5-a366bd8cc669.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/55fe6eea-e52e-46c0-9ad5-a366bd8cc669.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/55fe6eea-e52e-46c0-9ad5-a366bd8cc669
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa5d75a731cc4fb25af1419005f0eff344b080da4a274bc3637dd54443a8c05e5","name":"Libor Ježek","registered_at":"2026-06-11T21:07:57Z","symbol":"NIM0112070","token_address":"0x1d7cba9e59e89fb1056ab4bd9f9921059c112c95","type":"artist","uuid":"55fe6eea-e52e-46c0-9ad5-a366bd8cc669"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d75a731cc4fb25af1419005f0eff344b080da4a274bc3637dd54443a8c05e5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55fe6eea-e52e-46c0-9ad5-a366bd8cc669.json and https://artists.proofprofile.net/proofs/artist/55fe6eea-e52e-46c0-9ad5-a366bd8cc669.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xa5d75a731cc4fb25af1419005f0eff344b080da4a274bc3637dd54443a8c05e5","name":"Libor Ježek","registered_at":"2026-06-11T21:07:57Z","symbol":"NIM0112070","token_address":"0x1d7cba9e59e89fb1056ab4bd9f9921059c112c95","type":"artist","uuid":"55fe6eea-e52e-46c0-9ad5-a366bd8cc669"}
track: Oboe Concertino in G Major, Bryan G5: II. Minuetto. Moderato
  type: MusicRecording
  duration: PT3M24S
  duration ms: 204720
  explicit: false
  by artist: Johann Baptist Vanhal
  by artist: Vojtěch Podroužek
  by artist: Jan Karas
  by artist: Magdaléna Kutišová
  by artist: Libor Ježek
  by artist: Pavla Honsová
  by artist: David Matoušek
  by artist: Petr Kupčák
  by artist: Michael Halasz
  in album: Vaňhal: Symphonies, Vol. 5
    type: MusicAlbum
    date published: 2022-02-25
  popularity: 15
  genre: classical
  isrc code: HKI192118313
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-11T05:58:09+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf838c3e1756b5c8ffd31921aeadba1a722cca2c50c317e2b8cad20cd4e660a65
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 953520
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/953520
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192118313
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T13:32:09Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf838c3e1756b5c8ffd31921aeadba1a722cca2c50c317e2b8cad20cd4e660a65. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192118313.
    date published: 2026-06-13T13:32:09Z
  audio: Oboe Concertino in G Major, Bryan G5: II. Minuetto. Moderato
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 116.636
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.331
    additional property: Energy
      type: PropertyValue
      value: 0.059
    additional property: Speechiness
      type: PropertyValue
      value: 0.04
    additional property: Acousticness
      type: PropertyValue
      value: 0.971
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.265
    additional property: Liveness
      type: PropertyValue
      value: 0.131
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.348
    additional property: Loudness (dB)
      type: PropertyValue
      value: -23.67
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major