Lena Sobieraj
type: MusicGroup
genre: disco polo
popularity: 31
followers: 948
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6dbcc841fa2812ef9ed5380ae003fe3b462e732a105b26bfcba4c839c790a9cb
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/2e48a5fb-2694-4a96-9f54-3f23154151be.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2e48a5fb-2694-4a96-9f54-3f23154151be.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2e48a5fb-2694-4a96-9f54-3f23154151be
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6dbcc841fa2812ef9ed5380ae003fe3b462e732a105b26bfcba4c839c790a9cb","name":"Lena Sobieraj","registered_at":"2026-06-11T15:15:05Z","symbol":"NIM0060308","token_address":"0x5f590571ca13328f3e81ca642cdb5caf01a69be6","type":"artist","uuid":"2e48a5fb-2694-4a96-9f54-3f23154151be"}
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 0x6dbcc841fa2812ef9ed5380ae003fe3b462e732a105b26bfcba4c839c790a9cb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e48a5fb-2694-4a96-9f54-3f23154151be.json and https://artists.proofprofile.net/proofs/artist/2e48a5fb-2694-4a96-9f54-3f23154151be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0x6dbcc841fa2812ef9ed5380ae003fe3b462e732a105b26bfcba4c839c790a9cb","name":"Lena Sobieraj","registered_at":"2026-06-11T15:15:05Z","symbol":"NIM0060308","token_address":"0x5f590571ca13328f3e81ca642cdb5caf01a69be6","type":"artist","uuid":"2e48a5fb-2694-4a96-9f54-3f23154151be"}
album: Mała Figlarka
  type: MusicAlbum
  date published: 2025-03-30
album: To nie przyjaźń
  type: MusicAlbum
  date published: 2025-06-02
album: Dlaczego
  type: MusicAlbum
  date published: 2025-11-01
  track: Dlaczego
    type: MusicRecording
    duration: PT2M14S
    duration ms: 134884
    explicit: false
    by artist: Lena Sobieraj
    in album: Dlaczego
      type: MusicAlbum
      date published: 2025-11-01
    genre: disco polo
    isrc code: QT6EE2528383
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T05:20:48+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x76fe46fcfd83d37bb1d3c162b7c1f62bb93cc214a8fc180097e07a4a767621b0
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956790
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956790
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6EE2528383
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T12:31:54Z
    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 0x76fe46fcfd83d37bb1d3c162b7c1f62bb93cc214a8fc180097e07a4a767621b0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT6EE2528383.
      date published: 2026-07-05T12:31:54Z
    audio: Dlaczego
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.42
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.677
      additional property: Energy
        type: PropertyValue
        value: 0.222
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0.987
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.078
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.305
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.512
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor