Laura Kleinas
type: MusicGroup
popularity: 2
followers: 83
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x04a0cfd469f5c2a6cd4a51cc2173d756b5bd838b82d29eabf98d33fc3dc8aa83
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953991
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953991
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2efcf346-52f1-4d8e-9173-ace6c1326000.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2efcf346-52f1-4d8e-9173-ace6c1326000.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2efcf346-52f1-4d8e-9173-ace6c1326000
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:47:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x04a0cfd469f5c2a6cd4a51cc2173d756b5bd838b82d29eabf98d33fc3dc8aa83","name":"Laura Kleinas","registered_at":"2026-06-16T05:58:47Z","symbol":"NIM0959070","token_address":"0xd9655fbe876b9af22ba0e05eb047dde540ebcae4","type":"artist","uuid":"2efcf346-52f1-4d8e-9173-ace6c1326000"}
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 0x04a0cfd469f5c2a6cd4a51cc2173d756b5bd838b82d29eabf98d33fc3dc8aa83. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2efcf346-52f1-4d8e-9173-ace6c1326000.json and https://artists.proofprofile.net/proofs/artist/2efcf346-52f1-4d8e-9173-ace6c1326000.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:47:23Z
  text: {"copyright_id":"0x04a0cfd469f5c2a6cd4a51cc2173d756b5bd838b82d29eabf98d33fc3dc8aa83","name":"Laura Kleinas","registered_at":"2026-06-16T05:58:47Z","symbol":"NIM0959070","token_address":"0xd9655fbe876b9af22ba0e05eb047dde540ebcae4","type":"artist","uuid":"2efcf346-52f1-4d8e-9173-ace6c1326000"}
album: Les rues de Londres
  type: MusicAlbum
  date published: 2022-11-18
  track: Les rues de Londres
    type: MusicRecording
    duration: PT4M23S
    duration ms: 263500
    explicit: false
    by artist: Laura Kleinas
    in album: Les rues de Londres
      type: MusicAlbum
      date published: 2022-11-18
    isrc code: TCAGP2224067
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T20:03:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x24b72df57220d24c16ad4fa0b002c83dd49e8a5a8535e89654fa2e2433a6a7ce
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958776
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958776
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGP2224067
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T20:11:59Z
    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 0x24b72df57220d24c16ad4fa0b002c83dd49e8a5a8535e89654fa2e2433a6a7ce. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCAGP2224067.
      date published: 2026-07-19T20:11:59Z
    audio: Les rues de Londres
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 111.691
      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: 0.639
      additional property: Energy
        type: PropertyValue
        value: 0.437
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.592
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.097
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.272
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.934
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor