Lenn Kaufman
type: MusicGroup
popularity: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x31dd31f5c5d9c1e790e7ac03f8d617ae996531d28a5eb82c6b005bd29c9f61b7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953899
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953899
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/125a9efb-0ef4-48b4-9113-04966bfd1248.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/125a9efb-0ef4-48b4-9113-04966bfd1248.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/125a9efb-0ef4-48b4-9113-04966bfd1248
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:37:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x31dd31f5c5d9c1e790e7ac03f8d617ae996531d28a5eb82c6b005bd29c9f61b7","name":"Lenn Kaufman","registered_at":"2026-06-15T20:10:36Z","symbol":"NIM0818632","token_address":"0x13c5793ea6fee58c3d5c70b3575f1d33d2bded2d","type":"artist","uuid":"125a9efb-0ef4-48b4-9113-04966bfd1248"}
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 0x31dd31f5c5d9c1e790e7ac03f8d617ae996531d28a5eb82c6b005bd29c9f61b7. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/125a9efb-0ef4-48b4-9113-04966bfd1248.json and https://artists.proofprofile.net/proofs/artist/125a9efb-0ef4-48b4-9113-04966bfd1248.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T06:37:25Z
  text: {"copyright_id":"0x31dd31f5c5d9c1e790e7ac03f8d617ae996531d28a5eb82c6b005bd29c9f61b7","name":"Lenn Kaufman","registered_at":"2026-06-15T20:10:36Z","symbol":"NIM0818632","token_address":"0x13c5793ea6fee58c3d5c70b3575f1d33d2bded2d","type":"artist","uuid":"125a9efb-0ef4-48b4-9113-04966bfd1248"}
album: Late Night
  type: MusicAlbum
  date published: 2024-11-29
album: Opal
  type: MusicAlbum
  date published: 2024-12-09
album: Restart
  type: MusicAlbum
  date published: 2025-06-20
  track: Restart
    type: MusicRecording
    duration: PT2M16S
    duration ms: 136974
    explicit: false
    by artist: Lenn Kaufman
    in album: Restart
      type: MusicAlbum
      date published: 2025-06-20
    isrc code: GBPS86381907
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T13:41:17+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x65e88a1eca5b8fdeb4e9bc1936099aad6af9dcadf020f3b63183fb27822b2a08
    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/GBPS86381907
    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 0x65e88a1eca5b8fdeb4e9bc1936099aad6af9dcadf020f3b63183fb27822b2a08. 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/GBPS86381907.
      date published: 2026-07-05T01:12:41Z
    audio: Restart
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 148.961
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.516
      additional property: Energy
        type: PropertyValue
        value: 0.07
      additional property: Speechiness
        type: PropertyValue
        value: 0.068
      additional property: Acousticness
        type: PropertyValue
        value: 0.994
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.944
      additional property: Liveness
        type: PropertyValue
        value: 0.124
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.457
      additional property: Loudness (dB)
        type: PropertyValue
        value: -22.884
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor