Marek Andrzejewski
type: MusicGroup
popularity: 9
followers: 878
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3b8b83bc35392445e69056b15579a5bb960213752a5dc2be07d259ed8143292a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953954
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953954
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2640bd36-8ac4-4e4c-93dc-bed0bad55714.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2640bd36-8ac4-4e4c-93dc-bed0bad55714.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2640bd36-8ac4-4e4c-93dc-bed0bad55714
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:18:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3b8b83bc35392445e69056b15579a5bb960213752a5dc2be07d259ed8143292a","name":"Marek Andrzejewski","registered_at":"2026-06-16T02:50:13Z","symbol":"NIM0914028","token_address":"0x1baa3b0fead16d98e2ceb2a33c4539cc08a7593c","type":"artist","uuid":"2640bd36-8ac4-4e4c-93dc-bed0bad55714"}
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 0x3b8b83bc35392445e69056b15579a5bb960213752a5dc2be07d259ed8143292a. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2640bd36-8ac4-4e4c-93dc-bed0bad55714.json and https://artists.proofprofile.net/proofs/artist/2640bd36-8ac4-4e4c-93dc-bed0bad55714.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:18:37Z
  text: {"copyright_id":"0x3b8b83bc35392445e69056b15579a5bb960213752a5dc2be07d259ed8143292a","name":"Marek Andrzejewski","registered_at":"2026-06-16T02:50:13Z","symbol":"NIM0914028","token_address":"0x1baa3b0fead16d98e2ceb2a33c4539cc08a7593c","type":"artist","uuid":"2640bd36-8ac4-4e4c-93dc-bed0bad55714"}
album: Trolejbusowy batyskaf
  type: MusicAlbum
  date published: 1997
  track: Jak listy
    type: MusicRecording
    duration: PT3M7S
    duration ms: 187693
    explicit: false
    by artist: Marek Andrzejewski
    in album: Trolejbusowy batyskaf
      type: MusicAlbum
      date published: 1997
    isrc code: PLD999701108
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T10:33:12+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdf94eb3148b30fa3a0f8bc9929b68219daed8912a51c2e28329017ae6bbc7199
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958444
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958444
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLD999701108
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T19:12:23Z
    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 0xdf94eb3148b30fa3a0f8bc9929b68219daed8912a51c2e28329017ae6bbc7199. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLD999701108.
      date published: 2026-07-17T19:12:23Z
    audio: Jak listy
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.856
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.764
      additional property: Energy
        type: PropertyValue
        value: 0.536
      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.602
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.111
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.807
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.607
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Dziesięć pięter
  type: MusicAlbum
  date published: 2003
album: Ciało czyli lekcja fizyki
  type: MusicAlbum
  date published: 2003
album: Lot Amsterdam – Tokio
  type: MusicAlbum
  date published: 2003
album: Jutro do mnie zadzwoń
  type: MusicAlbum
  date published: 2003
album: Kup sobie rower
  type: MusicAlbum
  date published: 2003
album: Tylko misie
  type: MusicAlbum
  date published: 2003
album: Dziesięć pięter
  type: MusicAlbum
  date published: 2003
album: Elektryczny sweter
  type: MusicAlbum
  date published: 2012
album: Akustycznie
  type: MusicAlbum
  date published: 2015
album: Hasztagi
  type: MusicAlbum
  date published: 2019-03-26
album: Wariactwo
  type: MusicAlbum
  date published: 2021-10-22