Larkster Quartet
type: MusicGroup
popularity: 16
followers: 456
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xba5ce2c638d222b63c3af4655e9ca7ad3ee20ab3bfc1ad84520c98150bb47d61
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9defc8dc-baa5-4201-9e48-3a8570e3908f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9defc8dc-baa5-4201-9e48-3a8570e3908f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9defc8dc-baa5-4201-9e48-3a8570e3908f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T04:47:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xba5ce2c638d222b63c3af4655e9ca7ad3ee20ab3bfc1ad84520c98150bb47d61","name":"Larkster Quartet","registered_at":"2026-06-14T21:06:06Z","symbol":"NIM0576463","token_address":"0xae6419e81fa0c7470aa67d2e7b4dc3ba54f0ca01","type":"artist","uuid":"9defc8dc-baa5-4201-9e48-3a8570e3908f"}
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 0xba5ce2c638d222b63c3af4655e9ca7ad3ee20ab3bfc1ad84520c98150bb47d61. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9defc8dc-baa5-4201-9e48-3a8570e3908f.json and https://artists.proofprofile.net/proofs/artist/9defc8dc-baa5-4201-9e48-3a8570e3908f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:47:56Z
  text: {"copyright_id":"0xba5ce2c638d222b63c3af4655e9ca7ad3ee20ab3bfc1ad84520c98150bb47d61","name":"Larkster Quartet","registered_at":"2026-06-14T21:06:06Z","symbol":"NIM0576463","token_address":"0xae6419e81fa0c7470aa67d2e7b4dc3ba54f0ca01","type":"artist","uuid":"9defc8dc-baa5-4201-9e48-3a8570e3908f"}
album: Jazz Instrumental Covers
  type: MusicAlbum
  date published: 2017-09-08
album: Adore You
  type: MusicAlbum
  date published: 2022-10-23
album: Jazz Pop and Rock
  type: MusicAlbum
  date published: 2023-04-02
album: Always on My Mind
  type: MusicAlbum
  date published: 2023-04-30
album: Don’t Start Now (Acoustic)
  type: MusicAlbum
  date published: 2023-06-01
  track: Don’t Start Now (Acoustic)
    type: MusicRecording
    duration: PT3M10S
    duration ms: 190614
    explicit: false
    by artist: Larkster Quartet
    in album: Don’t Start Now (Acoustic)
      type: MusicAlbum
      date published: 2023-06-01
    isrc code: GBMNA2300580
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T16:28:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe8b577344becebee550c9a4e0162f6af163fa449f42d5c3921ed82b2d7745d4d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMNA2300580
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0xe8b577344becebee550c9a4e0162f6af163fa449f42d5c3921ed82b2d7745d4d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMNA2300580.
      date published: 2026-07-05T01:12:41Z
    audio: Don’t Start Now (Acoustic)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 111.829
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.743
      additional property: Energy
        type: PropertyValue
        value: 0.271
      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0.467
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.113
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.372
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.612
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: I Heard It Through the Grapevine
  type: MusicAlbum
  date published: 2024-07-21