Asuka Ota and Ryo Nagamatsu
type: MusicGroup
popularity: 5
followers: 65
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3f4c3bd59c24f987e5c6b75d51aa3ebbaca93d674159ec5bdf3b404a7f7b4b65
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954134
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954134
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7f36b0c2-956e-45a4-bde7-a311484a4d0a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7f36b0c2-956e-45a4-bde7-a311484a4d0a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7f36b0c2-956e-45a4-bde7-a311484a4d0a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:41:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3f4c3bd59c24f987e5c6b75d51aa3ebbaca93d674159ec5bdf3b404a7f7b4b65","name":"Asuka Ota and Ryo Nagamatsu","registered_at":"2026-06-17T09:57:13Z","symbol":"NIM1359522","token_address":"0xd661c8120056633794750712dbbe69373719664c","type":"artist","uuid":"7f36b0c2-956e-45a4-bde7-a311484a4d0a"}
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 0x3f4c3bd59c24f987e5c6b75d51aa3ebbaca93d674159ec5bdf3b404a7f7b4b65. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f36b0c2-956e-45a4-bde7-a311484a4d0a.json and https://artists.proofprofile.net/proofs/artist/7f36b0c2-956e-45a4-bde7-a311484a4d0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:41:05Z
  text: {"copyright_id":"0x3f4c3bd59c24f987e5c6b75d51aa3ebbaca93d674159ec5bdf3b404a7f7b4b65","name":"Asuka Ota and Ryo Nagamatsu","registered_at":"2026-06-17T09:57:13Z","symbol":"NIM1359522","token_address":"0xd661c8120056633794750712dbbe69373719664c","type":"artist","uuid":"7f36b0c2-956e-45a4-bde7-a311484a4d0a"}
album: Main Menu (From "Mario Kart Wii") [Orchestrated]
  type: MusicAlbum
  date published: 2022-10-03
  track: Main Menu (From "Mario Kart Wii") - Orchestrated
    type: MusicRecording
    duration: PT3M51S
    duration ms: 231724
    explicit: false
    by artist: Asuka Ota and Ryo Nagamatsu
    in album: Main Menu (From "Mario Kart Wii") [Orchestrated]
      type: MusicAlbum
      date published: 2022-10-03
    isrc code: QZPJ32202860
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T02:44:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x917850c0367aaf13fb3ecd4c5b872537d4f962d34873bd117e3334d41ef37e8e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956476
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956476
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32202860
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T09:04:44Z
    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 0x917850c0367aaf13fb3ecd4c5b872537d4f962d34873bd117e3334d41ef37e8e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPJ32202860.
      date published: 2026-07-03T09:04:44Z
    audio: Main Menu (From "Mario Kart Wii") - Orchestrated
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 86.508
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.349
      additional property: Energy
        type: PropertyValue
        value: 0.453
      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.776
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.442
      additional property: Liveness
        type: PropertyValue
        value: 0.118
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.456
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.11
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major