Yasushi Toyoshima
type: MusicGroup
genre: japanese classical
popularity: 6
followers: 243
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/953cff48-1527-4d2c-ac4c-777ddb9a8710.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/953cff48-1527-4d2c-ac4c-777ddb9a8710.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/953cff48-1527-4d2c-ac4c-777ddb9a8710
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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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 0x909e6e91e86770bb45252a3eb3b7bd1925b203eea2f35f53437690fa0870e994. 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/953cff48-1527-4d2c-ac4c-777ddb9a8710.json and https://artists.proofprofile.net/proofs/artist/953cff48-1527-4d2c-ac4c-777ddb9a8710.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x909e6e91e86770bb45252a3eb3b7bd1925b203eea2f35f53437690fa0870e994","name":"Yasushi Toyoshima","registered_at":"2026-06-17T18:04:19Z","symbol":"NIM1475680","token_address":"0x4e4998a6a3db68cdfc946eeee0c736d06c2405a1","type":"artist","uuid":"953cff48-1527-4d2c-ac4c-777ddb9a8710"}
album: J. S. Bach : Partita for Solo Violin No.2 / Ysaye : Sonata for solo violin No.4 / Prokofiev : Sonata for Solo Violin
  type: MusicAlbum
  date published: 1992
album: Czech Violin Recital
  type: MusicAlbum
  date published: 1994
album: Ravel & Grieg / Violin Sonatas
  type: MusicAlbum
  date published: 1995
album: Tenderly
  type: MusicAlbum
  date published: 2007
track: Ponyo Comes
  type: MusicRecording
  duration: PT3M36S
  duration ms: 216800
  explicit: false
  by artist: Yasushi Toyoshima
  in album: Ponyo on the Cliff by the Sea Image Album
    type: MusicAlbum
    date published: 2008-03-05
  isrc code: JPTK00714300
  additional property: CopyrightID
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTK00714300
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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 0xb96eb9c9f57f8e5e72d80a394ce3e1117ef3e0f45a283ac3d66351b78f1e1f40. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPTK00714300.
    date published: 2026-07-02T03:55:08Z
  audio: Ponyo Comes
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.505
    additional property: Energy
      type: PropertyValue
      value: 0.348
    additional property: Speechiness
      type: PropertyValue
      value: 0.032
    additional property: Acousticness
      type: PropertyValue
      value: 0.92
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.703
    additional property: Liveness
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      value: 0.072
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.22
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.801
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor