Washington Duke
type: MusicGroup
description: Washington Duke (December 18, 1820 – May 8, 1905) was an American tobacco industrialist and philanthropist. During the American Civil War he enlisted in the Confederate States Navy. In 1865, Duke foun
popularity: 3
followers: 51
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2b072a2049230512db926c449c90f5d71b7e0e0ae0e522dea5589a5ed40f73ae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954553
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954553
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ad866552-5ce0-4aa0-8117-d01f29b94db3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ad866552-5ce0-4aa0-8117-d01f29b94db3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ad866552-5ce0-4aa0-8117-d01f29b94db3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T11:51:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2b072a2049230512db926c449c90f5d71b7e0e0ae0e522dea5589a5ed40f73ae","name":"Washington Duke","registered_at":"2026-06-20T10:09:18Z","symbol":"NIM1591760","token_address":"0x169c06421dd2d0a05045cc5c80a800323ed44940","type":"artist","uuid":"ad866552-5ce0-4aa0-8117-d01f29b94db3"}
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 0x2b072a2049230512db926c449c90f5d71b7e0e0ae0e522dea5589a5ed40f73ae. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad866552-5ce0-4aa0-8117-d01f29b94db3.json and https://artists.proofprofile.net/proofs/artist/ad866552-5ce0-4aa0-8117-d01f29b94db3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T11:51:30Z
  text: {"copyright_id":"0x2b072a2049230512db926c449c90f5d71b7e0e0ae0e522dea5589a5ed40f73ae","name":"Washington Duke","registered_at":"2026-06-20T10:09:18Z","symbol":"NIM1591760","token_address":"0x169c06421dd2d0a05045cc5c80a800323ed44940","type":"artist","uuid":"ad866552-5ce0-4aa0-8117-d01f29b94db3"}
album: Minor Impulse
  type: MusicAlbum
  date published: 2024-10-25
  track: Minor Impulse
    type: MusicRecording
    duration: PT3M53S
    duration ms: 233040
    explicit: false
    by artist: Washington Duke
    in album: Minor Impulse
      type: MusicAlbum
      date published: 2024-10-25
    isrc code: USLZJ2405139
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T06:53:33+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc2ff3482d523436c8c8efd0022e95defbe866927b329c5a1ccd3f59a3a524fff
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958256
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2405139
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:22:18Z
    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 0xc2ff3482d523436c8c8efd0022e95defbe866927b329c5a1ccd3f59a3a524fff. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USLZJ2405139.
      date published: 2026-07-16T07:22:18Z
    audio: Minor Impulse
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 177.904
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.499
      additional property: Energy
        type: PropertyValue
        value: 0.493
      additional property: Speechiness
        type: PropertyValue
        value: 0.126
      additional property: Acousticness
        type: PropertyValue
        value: 0.724
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.831
      additional property: Liveness
        type: PropertyValue
        value: 0.112
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.912
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.974
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: I Only Have Eyes For You
  type: MusicAlbum
  date published: 2024-11-08
album: In Time
  type: MusicAlbum
  date published: 2024-11-22