Masami Takeuchi
type: MusicGroup
genre: traditional music
popularity: 7
followers: 186
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4bab903dbd1875e3f0f22758f841c054e07fad3f6ec68216e50c716c232fcb6b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e63ed17c-0cc1-40e0-aefb-0e5a33187a3c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e63ed17c-0cc1-40e0-aefb-0e5a33187a3c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e63ed17c-0cc1-40e0-aefb-0e5a33187a3c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4bab903dbd1875e3f0f22758f841c054e07fad3f6ec68216e50c716c232fcb6b","name":"Masami Takeuchi","registered_at":"2026-06-21T08:28:15Z","symbol":"NIM1874783","token_address":"0xf5d4dbfd498fc20b9b54cde6853e035338e9b9df","type":"artist","uuid":"e63ed17c-0cc1-40e0-aefb-0e5a33187a3c"}
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 0x4bab903dbd1875e3f0f22758f841c054e07fad3f6ec68216e50c716c232fcb6b. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63ed17c-0cc1-40e0-aefb-0e5a33187a3c.json and https://artists.proofprofile.net/proofs/artist/e63ed17c-0cc1-40e0-aefb-0e5a33187a3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x4bab903dbd1875e3f0f22758f841c054e07fad3f6ec68216e50c716c232fcb6b","name":"Masami Takeuchi","registered_at":"2026-06-21T08:28:15Z","symbol":"NIM1874783","token_address":"0xf5d4dbfd498fc20b9b54cde6853e035338e9b9df","type":"artist","uuid":"e63ed17c-0cc1-40e0-aefb-0e5a33187a3c"}
album: Theremin: Vocalise
  type: MusicAlbum
  date published: 2006
album: Theremin : Time Slips Away
  type: MusicAlbum
  date published: 2006
album: Theremin : VOCALISE
  type: MusicAlbum
  date published: 2006
album: Theremin : VOCALISE
  type: MusicAlbum
  date published: 2006
  track: Swan
    type: MusicRecording
    duration: PT3M1S
    duration ms: 181666
    explicit: false
    by artist: Masami Takeuchi
    in album: Theremin : VOCALISE
      type: MusicAlbum
      date published: 2006
    genre: traditional music
    isrc code: JPZ920900469
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T01:00:56+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x617235de783cb295bc14a2a41f622bba233def7c7171e077838f2132ebd656dc
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956742
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956742
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ920900469
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T22:50:09Z
    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 0x617235de783cb295bc14a2a41f622bba233def7c7171e077838f2132ebd656dc. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:50:09Z), 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/JPZ920900469.
      date published: 2026-07-19T22:50:09Z
    audio: Swan
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 69.622
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.15
      additional property: Energy
        type: PropertyValue
        value: 0.033
      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0.993
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.937
      additional property: Liveness
        type: PropertyValue
        value: 0.074
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.063
      additional property: Loudness (dB)
        type: PropertyValue
        value: -22.802
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Theremin : VOCALISE
  type: MusicAlbum
  date published: 2006
album: Theremin : Time Slips Away
  type: MusicAlbum
  date published: 2006
album: Theremin Vox Collection Vol. 1
  type: MusicAlbum
  date published: 2014-02-26
album: Theremin Vox Collection Vol.1
  type: MusicAlbum
  date published: 2014-02-26
album: Theremin Vox Collection Vol.1
  type: MusicAlbum
  date published: 2014-02-26
album: Theremin Vox Collection Vol.1
  type: MusicAlbum
  date published: 2014-02-26