Kuba Grochmalski
type: MusicGroup
popularity: 4
followers: 602
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1152ffcb566ac7ee2e2cdb0f70f84b3e13c274c01e541e7c2f12554feec47f6f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954659
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954659
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dc07859b-a3c5-40ce-a439-2126f9ef2e6d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dc07859b-a3c5-40ce-a439-2126f9ef2e6d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dc07859b-a3c5-40ce-a439-2126f9ef2e6d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T06:14:42Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1152ffcb566ac7ee2e2cdb0f70f84b3e13c274c01e541e7c2f12554feec47f6f","name":"Kuba Grochmalski","registered_at":"2026-06-21T04:41:47Z","symbol":"NIM1823049","token_address":"0x7bbd963b54defb7c3179267c7e41c9a72edb3134","type":"artist","uuid":"dc07859b-a3c5-40ce-a439-2126f9ef2e6d"}
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 0x1152ffcb566ac7ee2e2cdb0f70f84b3e13c274c01e541e7c2f12554feec47f6f. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc07859b-a3c5-40ce-a439-2126f9ef2e6d.json and https://artists.proofprofile.net/proofs/artist/dc07859b-a3c5-40ce-a439-2126f9ef2e6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T06:14:42Z
  text: {"copyright_id":"0x1152ffcb566ac7ee2e2cdb0f70f84b3e13c274c01e541e7c2f12554feec47f6f","name":"Kuba Grochmalski","registered_at":"2026-06-21T04:41:47Z","symbol":"NIM1823049","token_address":"0x7bbd963b54defb7c3179267c7e41c9a72edb3134","type":"artist","uuid":"dc07859b-a3c5-40ce-a439-2126f9ef2e6d"}
album: Leave
  type: MusicAlbum
  date published: 2018-10-25
album: On
  type: MusicAlbum
  date published: 2019-11-21
album: MONOGAMIA
  type: MusicAlbum
  date published: 2020-02-27
album: Not What You Want
  type: MusicAlbum
  date published: 2021-01-14
album: lodołamacz
  type: MusicAlbum
  date published: 2024-07-11
album: Miasto wspomnień
  type: MusicAlbum
  date published: 2025-10-17
  track: Miasto wspomnień
    type: MusicRecording
    duration: PT3M3S
    duration ms: 183111
    explicit: false
    by artist: Kuba Grochmalski
    in album: Miasto wspomnień
      type: MusicAlbum
      date published: 2025-10-17
    isrc code: PLI362538780
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T07:06:54+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfaa171dc4f732a447606702a6c6dd95aec03a61b7127baa767c70697e4ad66eb
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958256
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958256
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI362538780
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:22:18Z
    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 0xfaa171dc4f732a447606702a6c6dd95aec03a61b7127baa767c70697e4ad66eb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PLI362538780.
      date published: 2026-07-16T07:22:18Z
    audio: Miasto wspomnień
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 134.834
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.482
      additional property: Energy
        type: PropertyValue
        value: 0.502
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.018
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.068
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.113
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.642
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor