西島尊大
type: MusicGroup
genre: vocaloid
popularity: 5
followers: 1037
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x58b166faf40545d413e2bbffafe69634b47067d66933ae5152151f9e8965dfb2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953954
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953954
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/25ea8757-7cf2-4808-a299-352fba2ca2b0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/25ea8757-7cf2-4808-a299-352fba2ca2b0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/25ea8757-7cf2-4808-a299-352fba2ca2b0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:18:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x58b166faf40545d413e2bbffafe69634b47067d66933ae5152151f9e8965dfb2","name":"西島尊大","registered_at":"2026-06-16T02:50:03Z","symbol":"NIM0913987","token_address":"0x0833b1004f4505113424062ea639678da9ed8110","type":"artist","uuid":"25ea8757-7cf2-4808-a299-352fba2ca2b0"}
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b166faf40545d413e2bbffafe69634b47067d66933ae5152151f9e8965dfb2. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25ea8757-7cf2-4808-a299-352fba2ca2b0.json and https://artists.proofprofile.net/proofs/artist/25ea8757-7cf2-4808-a299-352fba2ca2b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:18:37Z
  text: {"copyright_id":"0x58b166faf40545d413e2bbffafe69634b47067d66933ae5152151f9e8965dfb2","name":"西島尊大","registered_at":"2026-06-16T02:50:03Z","symbol":"NIM0913987","token_address":"0x0833b1004f4505113424062ea639678da9ed8110","type":"artist","uuid":"25ea8757-7cf2-4808-a299-352fba2ca2b0"}
album: 図書室の本 (feat. Sou)
  type: MusicAlbum
  date published: 2018-02-02
album: RAVEN WORKS VOCAL WORKS
  type: MusicAlbum
  date published: 2018-04-09
album: よるをおよぐ
  type: MusicAlbum
  date published: 2018-05-31
  track: よるをおよぐ
    type: MusicRecording
    duration: PT4M14S
    duration ms: 254790
    explicit: false
    by artist: 西島尊大
    in album: よるをおよぐ
      type: MusicAlbum
      date published: 2018-05-31
    genre: vocaloid
    isrc code: TCJPH1812851
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T12:22:47+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb9e44b1d179e41acc73482e653c6be9b65b580ee2fb31fdfdf26ecee6a0c96d9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958286
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958286
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPH1812851
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T12:43:37Z
    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 0xb9e44b1d179e41acc73482e653c6be9b65b580ee2fb31fdfdf26ecee6a0c96d9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPH1812851.
      date published: 2026-07-16T12:43:37Z
    audio: よるをおよぐ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 100.051
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.617
      additional property: Energy
        type: PropertyValue
        value: 0.855
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.395
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.079
      additional property: Liveness
        type: PropertyValue
        value: 0.076
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.823
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.692
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: そらをおよぐ
  type: MusicAlbum
  date published: 2018-10-02
album: かはたれのうた
  type: MusicAlbum
  date published: 2019-05-02
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  type: MusicAlbum
  date published: 2020-05-20
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  type: MusicAlbum
  date published: 2024-07-16
album: 流レ星のsign (feat. 凪乃ましろ)
  type: MusicAlbum
  date published: 2024-08-11
album: 流レ星のsign (feat. 凪乃ましろ)
  type: MusicAlbum
  date published: 2025-07-18
album: UNDERTONE (feat. q'yul)
  type: MusicAlbum
  date published: 2025-07-25
album: Blue in Grace (feat. 潮成実)
  type: MusicAlbum
  date published: 2025-07-26
album: Blue Rush! (feat. 水瀬 凪)
  type: MusicAlbum
  date published: 2025-08-13
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  type: MusicAlbum
  date published: 2025-08-13
album: 39転調 (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-08-31
album: Dominant14 (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-09-14
album: 偽終止253 (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-09-22
album: 24KEYs (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-09-24
album: ていさつき (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-10-05
album: 45:64 (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-10-12
album: 86, 400 (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-10-19