Mayuko Katakura
type: MusicGroup
genre: jazz fusion
popularity: 13
followers: 824
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa4d09afe38e7b9d1e569bcc30790ee816d54b6dab7d2885d5ca38b0855f6e38b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953791
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953791
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df837409-a55a-49d4-8356-39525808f98b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df837409-a55a-49d4-8356-39525808f98b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/df837409-a55a-49d4-8356-39525808f98b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T13:40:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa4d09afe38e7b9d1e569bcc30790ee816d54b6dab7d2885d5ca38b0855f6e38b","name":"Mayuko Katakura","registered_at":"2026-06-15T03:55:45Z","symbol":"NIM0674302","token_address":"0x57a2d9449d1b5acce012d9a83d7d3669423066e5","type":"artist","uuid":"df837409-a55a-49d4-8356-39525808f98b"}
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 0xa4d09afe38e7b9d1e569bcc30790ee816d54b6dab7d2885d5ca38b0855f6e38b. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df837409-a55a-49d4-8356-39525808f98b.json and https://artists.proofprofile.net/proofs/artist/df837409-a55a-49d4-8356-39525808f98b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T13:40:30Z
  text: {"copyright_id":"0xa4d09afe38e7b9d1e569bcc30790ee816d54b6dab7d2885d5ca38b0855f6e38b","name":"Mayuko Katakura","registered_at":"2026-06-15T03:55:45Z","symbol":"NIM0674302","token_address":"0x57a2d9449d1b5acce012d9a83d7d3669423066e5","type":"artist","uuid":"df837409-a55a-49d4-8356-39525808f98b"}
album: インスピレーション
  type: MusicAlbum
  date published: 2009-09-16
album: フェイス
  type: MusicAlbum
  date published: 2010-09-29
album: The Echoes of Three
  type: MusicAlbum
  date published: 2015-09-16
album: The Echoes of Three
  type: MusicAlbum
  date published: 2015-09-16
album: Inspiration
  type: MusicAlbum
  date published: 2017-11-01
album: Face
  type: MusicAlbum
  date published: 2017-11-01
album: plays Coltrane
  type: MusicAlbum
  date published: 2020-10-27
album: plays Standards
  type: MusicAlbum
  date published: 2020-10-27
album: plays Coltrane
  type: MusicAlbum
  date published: 2020-10-27
album: plays Standards
  type: MusicAlbum
  date published: 2020-10-27
  track: 枯葉（カバー）
    type: MusicRecording
    duration: PT6M22S
    duration ms: 382066
    explicit: false
    by artist: Mayuko Katakura
    in album: plays Standards
      type: MusicAlbum
      date published: 2020-10-27
    genre: jazz fusion
    isrc code: JPZ922010723
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T01:05:16+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0bd7c63629f65cc499af1a0e4a6bfcb6f9896844e8ee9a967b2a973d46ecec9b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ922010723
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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 0x0bd7c63629f65cc499af1a0e4a6bfcb6f9896844e8ee9a967b2a973d46ecec9b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPZ922010723.
      date published: 2026-07-06T01:25:57Z
    audio: 枯葉（カバー）
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 101.694
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.488
      additional property: Energy
        type: PropertyValue
        value: 0.449
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.649
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.893
      additional property: Liveness
        type: PropertyValue
        value: 0.1
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.527
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.567
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major