Василь Кулак
type: MusicGroup
popularity: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3c8ebc8e7cbba296b120ffa75a1e04ac528cd0f0294338a0ed434cea17d7551a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef5b1c9d-17db-4cdb-8ec4-4467cad8ac5e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef5b1c9d-17db-4cdb-8ec4-4467cad8ac5e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ef5b1c9d-17db-4cdb-8ec4-4467cad8ac5e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3c8ebc8e7cbba296b120ffa75a1e04ac528cd0f0294338a0ed434cea17d7551a","name":"Василь Кулак","registered_at":"2026-06-21T12:24:17Z","symbol":"NIM1923199","token_address":"0x78584de34fc94a3320782a96b43e0a0a317393fd","type":"artist","uuid":"ef5b1c9d-17db-4cdb-8ec4-4467cad8ac5e"}
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 0x3c8ebc8e7cbba296b120ffa75a1e04ac528cd0f0294338a0ed434cea17d7551a. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef5b1c9d-17db-4cdb-8ec4-4467cad8ac5e.json and https://artists.proofprofile.net/proofs/artist/ef5b1c9d-17db-4cdb-8ec4-4467cad8ac5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x3c8ebc8e7cbba296b120ffa75a1e04ac528cd0f0294338a0ed434cea17d7551a","name":"Василь Кулак","registered_at":"2026-06-21T12:24:17Z","symbol":"NIM1923199","token_address":"0x78584de34fc94a3320782a96b43e0a0a317393fd","type":"artist","uuid":"ef5b1c9d-17db-4cdb-8ec4-4467cad8ac5e"}
album: Білі Черемхи
  type: MusicAlbum
  date published: 2025-07-09
  track: Білі Черемхи
    type: MusicRecording
    duration: PT3M12S
    duration ms: 192048
    explicit: false
    by artist: Василь Кулак
    in album: Білі Черемхи
      type: MusicAlbum
      date published: 2025-07-09
    isrc code: PLI360925901
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T07:39:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0491aad678339fbb45cc98c0190399b165e5a04b2e4ce7de14bd62d884b6e7bb
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958388
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958388
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI360925901
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T10:41:22Z
    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 0x0491aad678339fbb45cc98c0190399b165e5a04b2e4ce7de14bd62d884b6e7bb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:41:22Z), 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/PLI360925901.
      date published: 2026-07-17T10:41:22Z
    audio: Білі Черемхи
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 95.001
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.492
      additional property: Energy
        type: PropertyValue
        value: 0.832
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0.147
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.52
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.486
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.187
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor