Yoichi Takizawa
type: MusicGroup
genre: city pop
popularity: 13
followers: 1135
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x394ee1116b93406f1ffa23e4b3f594e803e8648447e14ae7a9a23afc9bdf2b9f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953660
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953660
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/52464c9f-9407-40aa-9268-6883fb165688.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/52464c9f-9407-40aa-9268-6883fb165688.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/52464c9f-9407-40aa-9268-6883fb165688
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T17:20:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x394ee1116b93406f1ffa23e4b3f594e803e8648447e14ae7a9a23afc9bdf2b9f","name":"Yoichi Takizawa","registered_at":"2026-06-14T13:04:01Z","symbol":"NIM0461500","token_address":"0x9a5f95f9816d78f0ef41ee54c6823cdb19a3e7e9","type":"artist","uuid":"52464c9f-9407-40aa-9268-6883fb165688"}
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 0x394ee1116b93406f1ffa23e4b3f594e803e8648447e14ae7a9a23afc9bdf2b9f. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52464c9f-9407-40aa-9268-6883fb165688.json and https://artists.proofprofile.net/proofs/artist/52464c9f-9407-40aa-9268-6883fb165688.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T17:20:01Z
  text: {"copyright_id":"0x394ee1116b93406f1ffa23e4b3f594e803e8648447e14ae7a9a23afc9bdf2b9f","name":"Yoichi Takizawa","registered_at":"2026-06-14T13:04:01Z","symbol":"NIM0461500","token_address":"0x9a5f95f9816d78f0ef41ee54c6823cdb19a3e7e9","type":"artist","uuid":"52464c9f-9407-40aa-9268-6883fb165688"}
album: LEONIDS NO KANATA NI
  type: MusicAlbum
  date published: 1978
album: レオニズの彼方に
  type: MusicAlbum
  date published: 1978
  track: レオニズの彼方に
    type: MusicRecording
    duration: PT3M12S
    duration ms: 192866
    explicit: false
    by artist: Yoichi Takizawa
    in album: レオニズの彼方に
      type: MusicAlbum
      date published: 1978
    genre: city pop
    isrc code: JPAL01500660
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T16:10:11+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6740c35ea7073aa20922383c1656c254637b74b919af86e8b9f4878fab01607d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958176
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958176
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPAL01500660
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T19:11:29Z
    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 0x6740c35ea7073aa20922383c1656c254637b74b919af86e8b9f4878fab01607d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:11:29Z), 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/JPAL01500660.
      date published: 2026-07-15T19:11:29Z
    audio: レオニズの彼方に
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 138.563
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.515
      additional property: Energy
        type: PropertyValue
        value: 0.764
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.344
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.22
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.633
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.685
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: レオニズの彼方に
  type: MusicAlbum
  date published: 1978-10-05
album: サンデーパーク
  type: MusicAlbum
  date published: 1982-06-25
album: BOY (+9)
  type: MusicAlbum
  date published: 2024-12-18
album: かぎりなき夏 (Van Paugam 2024 Remix)
  type: MusicAlbum
  date published: 2024-12-25