Hiroyuki Okita
type: MusicGroup
genre: anime
genre: city pop
genre: kayokyoku
popularity: 24
followers: 2069
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb9ba528f79f993e8550116326fa5f5e28dfb60acd7a09471cee210c802134d97
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fea98ed5-1afd-4461-b8cd-ce22d1fbd446.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fea98ed5-1afd-4461-b8cd-ce22d1fbd446.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fea98ed5-1afd-4461-b8cd-ce22d1fbd446
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb9ba528f79f993e8550116326fa5f5e28dfb60acd7a09471cee210c802134d97","name":"Hiroyuki Okita","registered_at":"2026-06-12T14:38:53Z","symbol":"NIM0327972","token_address":"0xb98af6df077d8da19decbc0d674e79f5a06ba343","type":"artist","uuid":"fea98ed5-1afd-4461-b8cd-ce22d1fbd446"}
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 0xb9ba528f79f993e8550116326fa5f5e28dfb60acd7a09471cee210c802134d97. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fea98ed5-1afd-4461-b8cd-ce22d1fbd446.json and https://artists.proofprofile.net/proofs/artist/fea98ed5-1afd-4461-b8cd-ce22d1fbd446.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0xb9ba528f79f993e8550116326fa5f5e28dfb60acd7a09471cee210c802134d97","name":"Hiroyuki Okita","registered_at":"2026-06-12T14:38:53Z","symbol":"NIM0327972","token_address":"0xb98af6df077d8da19decbc0d674e79f5a06ba343","type":"artist","uuid":"fea98ed5-1afd-4461-b8cd-ce22d1fbd446"}
album: ゴールデン☆ベスト 沖田浩之
  type: MusicAlbum
  date published: 2008-01-23
album: ゴールデン☆ベスト 沖田浩之
  type: MusicAlbum
  date published: 2008-01-23
  track: 君に捧げるララバイ
    type: MusicRecording
    duration: PT3M42S
    duration ms: 222440
    explicit: false
    by artist: Hiroyuki Okita
    in album: ゴールデン☆ベスト 沖田浩之
      type: MusicAlbum
      date published: 2008-01-23
    genre: anime
    genre: city pop
    genre: kayokyoku
    isrc code: JPSR08414390
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T11:21:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb270ce21a71e652aef0233f358b651b46fe04feebb7aacb4dec518e29206b7ec
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956551
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956551
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR08414390
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T21:18:05Z
    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 0xb270ce21a71e652aef0233f358b651b46fe04feebb7aacb4dec518e29206b7ec. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPSR08414390.
      date published: 2026-07-03T21:18:05Z
    audio: 君に捧げるララバイ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 138.978
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.675
      additional property: Energy
        type: PropertyValue
        value: 0.714
      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.408
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.174
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.597
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.001
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: E気持 / 燃えてヒーロー BESTタッグ
  type: MusicAlbum
  date published: 2022-03-09