Tadashi Shinkawa
type: MusicGroup
genre: japanese indie
genre: shibuya-kei
popularity: 7
followers: 800
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x34ff04534db48a74c4a93356424c24f5fb6901a5619e701d075dd057545be7e3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b0dfc3b0-9c82-4479-8967-e5ae6b3ce050.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b0dfc3b0-9c82-4479-8967-e5ae6b3ce050.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b0dfc3b0-9c82-4479-8967-e5ae6b3ce050
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x34ff04534db48a74c4a93356424c24f5fb6901a5619e701d075dd057545be7e3","name":"Tadashi Shinkawa","registered_at":"2026-06-20T11:49:35Z","symbol":"NIM1608656","token_address":"0xb3cc98a2fb3dea93cf0d42bbca1e2e17f0427257","type":"artist","uuid":"b0dfc3b0-9c82-4479-8967-e5ae6b3ce050"}
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 0x34ff04534db48a74c4a93356424c24f5fb6901a5619e701d075dd057545be7e3. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0dfc3b0-9c82-4479-8967-e5ae6b3ce050.json and https://artists.proofprofile.net/proofs/artist/b0dfc3b0-9c82-4479-8967-e5ae6b3ce050.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0x34ff04534db48a74c4a93356424c24f5fb6901a5619e701d075dd057545be7e3","name":"Tadashi Shinkawa","registered_at":"2026-06-20T11:49:35Z","symbol":"NIM1608656","token_address":"0xb3cc98a2fb3dea93cf0d42bbca1e2e17f0427257","type":"artist","uuid":"b0dfc3b0-9c82-4479-8967-e5ae6b3ce050"}
album: sweet hereafter
  type: MusicAlbum
  date published: 2003-01-08
  track: 星のさざなみ
    type: MusicRecording
    duration: PT3M11S
    duration ms: 191253
    explicit: false
    by artist: Tadashi Shinkawa
    in album: sweet hereafter
      type: MusicAlbum
      date published: 2003-01-08
    genre: japanese indie
    genre: shibuya-kei
    isrc code: TCJPJ1952528
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-06T14:35:33+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf252a1ce28fda55b1c731b274658018543c8562acf94d34bb78626bab88edbeb
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956857
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956857
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPJ1952528
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:26:17Z
    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 0xf252a1ce28fda55b1c731b274658018543c8562acf94d34bb78626bab88edbeb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPJ1952528.
      date published: 2026-07-06T01:26:17Z
    audio: 星のさざなみ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 88.277
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.649
      additional property: Energy
        type: PropertyValue
        value: 0.271
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.779
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.785
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.274
      additional property: Loudness (dB)
        type: PropertyValue
        value: -19.392
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Christy
  type: MusicAlbum
  date published: 2005-12-07
album: Paintings of Lights
  type: MusicAlbum
  date published: 2015-01-11
album: Street Illusion
  type: MusicAlbum
  date published: 2021-02-12