Marian Demar-Mikuszewski
type: MusicGroup
popularity: 2
followers: 53
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x89b006235fcf124c1a6996ebe647df697eb1c0fd03dd2ecd3abfdc72570b0224
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efd0408e-e1f7-47cb-94a8-520f89cf6759.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efd0408e-e1f7-47cb-94a8-520f89cf6759.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/efd0408e-e1f7-47cb-94a8-520f89cf6759
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x89b006235fcf124c1a6996ebe647df697eb1c0fd03dd2ecd3abfdc72570b0224","name":"Marian Demar-Mikuszewski","registered_at":"2026-06-21T12:36:14Z","symbol":"NIM1925473","token_address":"0x91ee29015a29cc7d9610502b259d99d3450daa50","type":"artist","uuid":"efd0408e-e1f7-47cb-94a8-520f89cf6759"}
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 0x89b006235fcf124c1a6996ebe647df697eb1c0fd03dd2ecd3abfdc72570b0224. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efd0408e-e1f7-47cb-94a8-520f89cf6759.json and https://artists.proofprofile.net/proofs/artist/efd0408e-e1f7-47cb-94a8-520f89cf6759.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x89b006235fcf124c1a6996ebe647df697eb1c0fd03dd2ecd3abfdc72570b0224","name":"Marian Demar-Mikuszewski","registered_at":"2026-06-21T12:36:14Z","symbol":"NIM1925473","token_address":"0x91ee29015a29cc7d9610502b259d99d3450daa50","type":"artist","uuid":"efd0408e-e1f7-47cb-94a8-520f89cf6759"}
track: Czy pamiętasz tę noc w Zakopanem

Czy pamiętasz tę noc w Zakopanem
type: MusicRecording
duration: PT3M22S
duration ms: 202093
explicit: false
by artist: Marian Demar-Mikuszewski
in album: Zlota Kolekcja - Lata 20-Te, Lata 30-Te (Vol.2)
  type: MusicAlbum
  date published: 2004-11-27
isrc code: PLA551400241
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T23:56:42+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x87265aaacef4a859d72ecae6e8064d97a668d413fcf7041aeeb8cd1e6a51d00d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551400241
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956304
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87265aaacef4a859d72ecae6e8064d97a668d413fcf7041aeeb8cd1e6a51d00d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLA551400241.
  date published: 2026-07-02T03:55:08Z
audio: Czy pamiętasz tę noc w Zakopanem
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 126.072
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.446
  additional property: Energy
    type: PropertyValue
    value: 0.402
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.97
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.343
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.44
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.943
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major