Marcelina Kierejsza
type: MusicGroup
popularity: 3
followers: 45
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9d6002ed7d8e3ecd1c96e08938564fe0ff07bb9e543510fae94be4261e303981
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4f63beb2-5e31-44ba-a316-2a0f8fba821b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4f63beb2-5e31-44ba-a316-2a0f8fba821b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4f63beb2-5e31-44ba-a316-2a0f8fba821b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9d6002ed7d8e3ecd1c96e08938564fe0ff07bb9e543510fae94be4261e303981","name":"Marcelina Kierejsza","registered_at":"2026-06-16T17:34:49Z","symbol":"NIM1125168","token_address":"0x361f20f1926c0b16ca5088740de8ec51f45e3719","type":"artist","uuid":"4f63beb2-5e31-44ba-a316-2a0f8fba821b"}
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 0x9d6002ed7d8e3ecd1c96e08938564fe0ff07bb9e543510fae94be4261e303981. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f63beb2-5e31-44ba-a316-2a0f8fba821b.json and https://artists.proofprofile.net/proofs/artist/4f63beb2-5e31-44ba-a316-2a0f8fba821b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x9d6002ed7d8e3ecd1c96e08938564fe0ff07bb9e543510fae94be4261e303981","name":"Marcelina Kierejsza","registered_at":"2026-06-16T17:34:49Z","symbol":"NIM1125168","token_address":"0x361f20f1926c0b16ca5088740de8ec51f45e3719","type":"artist","uuid":"4f63beb2-5e31-44ba-a316-2a0f8fba821b"}
album: Złudzenie
  type: MusicAlbum
  date published: 2023-04-05
album: little girl
  type: MusicAlbum
  date published: 2023-05-02
album: Nic dwa razy
  type: MusicAlbum
  date published: 2023-05-13
album: Nobody (piano - Matthew May)
  type: MusicAlbum
  date published: 2023-06-07
album: Lullaby (piano - Matthew May)
  type: MusicAlbum
  date published: 2023-06-14
album: Let Her Go (speed up)
  type: MusicAlbum
  date published: 2023-06-14
  track: Let Her Go
    type: MusicRecording
    duration: PT3M15S
    duration ms: 195765
    explicit: false
    by artist: Marcelina Kierejsza
    in album: Let Her Go (speed up)
      type: MusicAlbum
      date published: 2023-06-14
    isrc code: QZMEM2379220
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T19:37:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xeb882b8f3435c7167c67d7ddaa5298359ccf809335285105e8c59a1f8685dde8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956728
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956728
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2379220
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:43:49Z
    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 0xeb882b8f3435c7167c67d7ddaa5298359ccf809335285105e8c59a1f8685dde8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEM2379220.
      date published: 2026-07-05T01:43:49Z
    audio: Let Her Go
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 150.656
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.381
      additional property: Energy
        type: PropertyValue
        value: 0.24
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.71
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.086
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.179
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.14
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Zabierz mnie
  type: MusicAlbum
  date published: 2023-07-08
album: Let It Be
  type: MusicAlbum
  date published: 2023-07-14
album: Only 1
  type: MusicAlbum
  date published: 2023-07-30
album: Time was so hard
  type: MusicAlbum
  date published: 2023-08-14
album: I Don't Need Plastic Therapy
  type: MusicAlbum
  date published: 2023-10-19
album: I Don't Need Plastic Therapy (speed up)
  type: MusicAlbum
  date published: 2023-11-02
album: Winter Things
  type: MusicAlbum
  date published: 2023-11-16
album: Nie potrafię
  type: MusicAlbum
  date published: 2023-11-23
album: lose you
  type: MusicAlbum
  date published: 2024-01-13
album: Under Gravity
  type: MusicAlbum
  date published: 2025-04-16
album: Mamo Tyś Płakała
  type: MusicAlbum
  date published: 2025-04-20
album: Under Gravity (Speed Up Version)
  type: MusicAlbum
  date published: 2025-04-23
album: Invisible (Personne Ne Me Voit)
  type: MusicAlbum
  date published: 2025-07-31