合唱作曲家 弓削田健介
type: MusicGroup
genre: choral
popularity: 7
followers: 27
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x634def95b853dc5c7cac86d9d5c3a936d85149fc61a71819535fe4ffac2da14d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
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additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9bc3e8a7-e86b-4813-8ae1-ac3c0bc9c337.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9bc3e8a7-e86b-4813-8ae1-ac3c0bc9c337
additional property: OTSTimestamp
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  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
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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 0x634def95b853dc5c7cac86d9d5c3a936d85149fc61a71819535fe4ffac2da14d. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bc3e8a7-e86b-4813-8ae1-ac3c0bc9c337.json and https://artists.proofprofile.net/proofs/artist/9bc3e8a7-e86b-4813-8ae1-ac3c0bc9c337.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T05:07:36Z
  text: {"copyright_id":"0x634def95b853dc5c7cac86d9d5c3a936d85149fc61a71819535fe4ffac2da14d","name":"合唱作曲家 弓削田健介","registered_at":"2026-06-20T04:13:02Z","symbol":"NIM1507570","token_address":"0x5d049487961a61cd4eb0c35af361ee7c71f3b6fd","type":"artist","uuid":"9bc3e8a7-e86b-4813-8ae1-ac3c0bc9c337"}
album: いのちのうた 小学生の合唱曲
  type: MusicAlbum
  date published: 2024-03-04
  track: 次の空へ - 同声合唱 Live
    type: MusicRecording
    duration: PT4M4S
    duration ms: 244116
    explicit: false
    by artist: 合唱作曲家 弓削田健介
    in album: いのちのうた 小学生の合唱曲
      type: MusicAlbum
      date published: 2024-03-04
    genre: choral
    isrc code: TCJPZ2455319
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: OTSHash
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958491
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPZ2455319
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T04:29:42Z
    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 0xdaeb60b5ca2f85be8fd1e4ec435fc9125e527efe918d096c5964b1ea1a64a8b9. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCJPZ2455319.
      date published: 2026-07-18T04:29:42Z
    audio: 次の空へ - 同声合唱 Live
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 89.563
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.177
      additional property: Energy
        type: PropertyValue
        value: 0.456
      additional property: Speechiness
        type: PropertyValue
        value: 0.038
      additional property: Acousticness
        type: PropertyValue
        value: 0.97
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.346
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.274
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.743
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 平和のうた 小学生の合唱曲
  type: MusicAlbum
  date published: 2024-03-08
album: 卒業式のうた 小学生の合唱曲
  type: MusicAlbum
  date published: 2024-12-16
album: 音楽会の元気ソング 小学生の合唱曲
  type: MusicAlbum
  date published: 2024-12-23