Bartosz Hołubowski
type: MusicGroup
popularity: 4
followers: 121
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6676fdf5fb787569b126275a8d488c8c58303f759e7c7c50eb5fc37acb600849
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953949
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953949
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ed2d97d-f87f-40d5-b1b1-6581428fa799.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ed2d97d-f87f-40d5-b1b1-6581428fa799.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1ed2d97d-f87f-40d5-b1b1-6581428fa799
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:28:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6676fdf5fb787569b126275a8d488c8c58303f759e7c7c50eb5fc37acb600849","name":"Bartosz Hołubowski","registered_at":"2026-06-16T00:35:16Z","symbol":"NIM0881791","token_address":"0xde4bad1c7f11171b9f891de7db7ced3833efe713","type":"artist","uuid":"1ed2d97d-f87f-40d5-b1b1-6581428fa799"}
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 0x6676fdf5fb787569b126275a8d488c8c58303f759e7c7c50eb5fc37acb600849. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ed2d97d-f87f-40d5-b1b1-6581428fa799.json and https://artists.proofprofile.net/proofs/artist/1ed2d97d-f87f-40d5-b1b1-6581428fa799.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x6676fdf5fb787569b126275a8d488c8c58303f759e7c7c50eb5fc37acb600849","name":"Bartosz Hołubowski","registered_at":"2026-06-16T00:35:16Z","symbol":"NIM0881791","token_address":"0xde4bad1c7f11171b9f891de7db7ced3833efe713","type":"artist","uuid":"1ed2d97d-f87f-40d5-b1b1-6581428fa799"}
album: Wierzę w Nas
  type: MusicAlbum
  date published: 2021-05-22
album: Schron
  type: MusicAlbum
  date published: 2022-03-25
album: Nieprawda
  type: MusicAlbum
  date published: 2024-07-05
  track: Nieprawda
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217714
    explicit: false
    by artist: Bartosz Hołubowski
    in album: Nieprawda
      type: MusicAlbum
      date published: 2024-07-05
    isrc code: PLC062421137
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T11:43:25+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x65e659e51c93a4b89635870cb7997954e751c8ebb8d9aac9a2c292503b1d1969
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958286
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958286
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLC062421137
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T12:43:37Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e659e51c93a4b89635870cb7997954e751c8ebb8d9aac9a2c292503b1d1969. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLC062421137.
      date published: 2026-07-16T12:43:37Z
    audio: Nieprawda
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.846
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.562
      additional property: Energy
        type: PropertyValue
        value: 0.188
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.152
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.077
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.264
      additional property: Loudness (dB)
        type: PropertyValue
        value: -20.718
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Nieprawda (wersja akustyczna)
  type: MusicAlbum
  date published: 2024-09-05