Zuzanna Całka
type: MusicGroup
genre: neoclassical
popularity: 20
followers: 616
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xda453ad1d6ee94bb9078a5f58e3e6c3711d7a97865fb64146dd19339503dc138
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1389692-9e20-4b9d-a8e3-a92d469b1520.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1389692-9e20-4b9d-a8e3-a92d469b1520.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e1389692-9e20-4b9d-a8e3-a92d469b1520
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xda453ad1d6ee94bb9078a5f58e3e6c3711d7a97865fb64146dd19339503dc138","name":"Zuzanna Całka","registered_at":"2026-06-15T04:11:01Z","symbol":"NIM0677946","token_address":"0x13e8714644605a55c666f97bce17a44521c80157","type":"artist","uuid":"e1389692-9e20-4b9d-a8e3-a92d469b1520"}
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 0xda453ad1d6ee94bb9078a5f58e3e6c3711d7a97865fb64146dd19339503dc138. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1389692-9e20-4b9d-a8e3-a92d469b1520.json and https://artists.proofprofile.net/proofs/artist/e1389692-9e20-4b9d-a8e3-a92d469b1520.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T15:41:00Z
  text: {"copyright_id":"0xda453ad1d6ee94bb9078a5f58e3e6c3711d7a97865fb64146dd19339503dc138","name":"Zuzanna Całka","registered_at":"2026-06-15T04:11:01Z","symbol":"NIM0677946","token_address":"0x13e8714644605a55c666f97bce17a44521c80157","type":"artist","uuid":"e1389692-9e20-4b9d-a8e3-a92d469b1520"}
album: Late Night Takes
  type: MusicAlbum
  date published: 2023-03-29
  track: My Friend Thunder
    type: MusicRecording
    duration: PT6M26S
    duration ms: 386800
    explicit: false
    by artist: Zuzanna Całka
    in album: Late Night Takes
      type: MusicAlbum
      date published: 2023-03-29
    genre: neoclassical
    isrc code: PL97X2310005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T17:59:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8429db6390cbb1034e594fb5d06d85a4528e1ede355e4c89dbfe8ab95be9f8b3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958765
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958765
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL97X2310005
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T18:01:47Z
    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 0x8429db6390cbb1034e594fb5d06d85a4528e1ede355e4c89dbfe8ab95be9f8b3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/PL97X2310005.
      date published: 2026-07-19T18:01:47Z
    audio: My Friend Thunder
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 79.408
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.273
      additional property: Energy
        type: PropertyValue
        value: 0.028
      additional property: Speechiness
        type: PropertyValue
        value: 0.037
      additional property: Acousticness
        type: PropertyValue
        value: 0.994
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.911
      additional property: Liveness
        type: PropertyValue
        value: 0.1
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.192
      additional property: Loudness (dB)
        type: PropertyValue
        value: -32.297
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Just Us (Rework)
  type: MusicAlbum
  date published: 2024-05-24
album: Just Us
  type: MusicAlbum
  date published: 2024-05-24
album: Arpeggio in D Minor
  type: MusicAlbum
  date published: 2024-10-11
album: Impromptu
  type: MusicAlbum
  date published: 2025-02-21
  track: Impromptu
    type: MusicRecording
    duration: PT2M50S
    duration ms: 170727
    explicit: false
    by artist: Zuzanna Całka
    in album: Impromptu
      type: MusicAlbum
      date published: 2025-02-21
    genre: neoclassical
    isrc code: DEUE12512923
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T07:54:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2f11f7d79ec31aa25a8e0183217fb8c7f53c92c5c1e9e2645154f0d1dc64e667
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958263
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958263
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE12512923
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T08:19:47Z
    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 0x2f11f7d79ec31aa25a8e0183217fb8c7f53c92c5c1e9e2645154f0d1dc64e667. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEUE12512923.
      date published: 2026-07-16T08:19:47Z
    audio: Impromptu
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 168.075
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.454
      additional property: Energy
        type: PropertyValue
        value: 0.177
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Pulsing
album: Nautilus

Acousticness
type: PropertyValue
value: 0.832

Instrumentalness
type: PropertyValue
value: 0.966

Liveness
type: PropertyValue
value: 0.093

Valence (Positivity)
type: PropertyValue
value: 0.087

Loudness (dB)
type: PropertyValue
value: -23.226

Key Name
type: PropertyValue
value: F#

Mode Name
type: PropertyValue
value: Major

Pulsing
type: MusicAlbum
date published: 2025-03-21

Nautilus
type: MusicAlbum
date published: 2025-04-04

Late Night Takes
type: MusicAlbum
date published: 2025-04-11