The Ward Marston Piano Trio
type: MusicGroup
genre: brazilian jazz
popularity: 5
followers: 21
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/931dc394-1825-4640-b095-3404bd7e470f.ots
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  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/931dc394-1825-4640-b095-3404bd7e470f.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/931dc394-1825-4640-b095-3404bd7e470f
additional property: OTSTimestamp
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  value: 2026-06-19T03:51:26Z
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf26fb5de6beaaadb800657aed4e45f971b530b46e6cfe32aea5c3cc5cafee65. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/931dc394-1825-4640-b095-3404bd7e470f.json and https://artists.proofprofile.net/proofs/artist/931dc394-1825-4640-b095-3404bd7e470f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xcf26fb5de6beaaadb800657aed4e45f971b530b46e6cfe32aea5c3cc5cafee65","name":"The Ward Marston Piano Trio","registered_at":"2026-06-17T17:02:05Z","symbol":"NIM1460813","token_address":"0x839ad36b2c0a268946dc4a21928dab69478fd9b3","type":"artist","uuid":"931dc394-1825-4640-b095-3404bd7e470f"}
album: Unforgettable - Instrumental Hits of Nat "King" Cole
  type: MusicAlbum
  date published: 2012-10-15
  track: Unforgettable
    type: MusicRecording
    duration: PT3M47S
    duration ms: 227826
    explicit: false
    by artist: The Ward Marston Piano Trio
    in album: Unforgettable - Instrumental Hits of Nat "King" Cole
      type: MusicAlbum
      date published: 2012-10-15
    genre: brazilian jazz
    isrc code: USKYW1228704
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T02:13:31+00:00
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      type: PropertyValue
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    additional property: OTSBitcoinBlockVerifyURL
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      value: https://blockstream.info/api/block-height/958955
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USKYW1228704
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:03:40Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8032e0062fe4608e990f41f75dfe1699010efb98396accd9a28365c4b23c8b44. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USKYW1228704.
      date published: 2026-07-21T03:03:40Z
    audio: Unforgettable
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 74.478
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.609
      additional property: Energy
        type: PropertyValue
        value: 0.162
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.84
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.531
      additional property: Liveness
        type: PropertyValue
        value: 0.121
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.168
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.219
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Unforgettable - Instrumental Hits of Nat 'King' Cole
  type: MusicAlbum
  date published: 2016-05-10
album: Unforgettable
  type: MusicAlbum
  date published: 2023-09-01