Takaishi Tomoya & The Natasha Seven
type: MusicGroup
genre: folk
genre: kayokyoku
popularity: 10
followers: 1969
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2354420faf755a53d314830bba044177ae9368360ccb4784e4fe75c9ab33de00
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/7e39c3ab-1c48-492d-86df-a5f1308281a1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7e39c3ab-1c48-492d-86df-a5f1308281a1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7e39c3ab-1c48-492d-86df-a5f1308281a1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:41:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2354420faf755a53d314830bba044177ae9368360ccb4784e4fe75c9ab33de00","name":"Takaishi Tomoya & The Natasha Seven","registered_at":"2026-06-17T09:33:47Z","symbol":"NIM1353933","token_address":"0x7bc193cc6ee720460a97a9fee97c11509036a4bd","type":"artist","uuid":"7e39c3ab-1c48-492d-86df-a5f1308281a1"}
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 0x2354420faf755a53d314830bba044177ae9368360ccb4784e4fe75c9ab33de00. 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/7e39c3ab-1c48-492d-86df-a5f1308281a1.json and https://artists.proofprofile.net/proofs/artist/7e39c3ab-1c48-492d-86df-a5f1308281a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:41:05Z
  text: {"copyright_id":"0x2354420faf755a53d314830bba044177ae9368360ccb4784e4fe75c9ab33de00","name":"Takaishi Tomoya & The Natasha Seven","registered_at":"2026-06-17T09:33:47Z","symbol":"NIM1353933","token_address":"0x7bc193cc6ee720460a97a9fee97c11509036a4bd","type":"artist","uuid":"7e39c3ab-1c48-492d-86df-a5f1308281a1"}
album: 高石ともやとザ・ナターシャー・セブン
  type: MusicAlbum
  date published: 1972-12-01
album: 高石ともやとザ・ナターシャー・セブン
  type: MusicAlbum
  date published: 1972-12-01
album: フィールド・フォーク Vol.1 FROM NAKATSUGAWA
  type: MusicAlbum
  date published: 1973-03-05
album: BIG ARTIST Best COLLECTION 高石ともやとザ・ナターシャーセブン
  type: MusicAlbum
  date published: 1989-06-07
  track: 街
    type: MusicRecording
    duration: PT3M56S
    duration ms: 236893
    explicit: false
    by artist: Takaishi Tomoya & The Natasha Seven
    in album: BIG ARTIST Best COLLECTION 高石ともやとザ・ナターシャーセブン
      type: MusicAlbum
      date published: 1989-06-07
    genre: folk
    genre: kayokyoku
    isrc code: JPTO08914260
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T07:00:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb275d0ce41e98eaecd0f1fc7e470a676eefada217ff35540d534e6f0ebe92f53
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958980
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958980
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTO08914260
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T07:04:12Z
    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 0xb275d0ce41e98eaecd0f1fc7e470a676eefada217ff35540d534e6f0ebe92f53. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPTO08914260.
      date published: 2026-07-21T07:04:12Z
    audio: 街
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 182.577
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.257
      additional property: Energy
        type: PropertyValue
        value: 0.175
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.864
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.08
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.313
      additional property: Loudness (dB)
        type: PropertyValue
        value: -17.474
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: BIG ARTIST BEST COLLECTION 高石ともやとザ・ナターシャ・セブン
  type: MusicAlbum
  date published: 1995-02-22
album: 1972 コンサート-KBS KYOTO INCREDIBLE TAPES-
  type: MusicAlbum
  date published: 2020-02-19