Naka-Dai
type: MusicGroup
genre: vocaloid
popularity: 4
followers: 613
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x249faa1f65fe60bf67df54adf017004e7877d023814d79ed5c684ea05fc6796f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5c2a0b36-9772-4b0f-aac0-2078b9765d77.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5c2a0b36-9772-4b0f-aac0-2078b9765d77.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5c2a0b36-9772-4b0f-aac0-2078b9765d77
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
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 0x249faa1f65fe60bf67df54adf017004e7877d023814d79ed5c684ea05fc6796f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c2a0b36-9772-4b0f-aac0-2078b9765d77.json and https://artists.proofprofile.net/proofs/artist/5c2a0b36-9772-4b0f-aac0-2078b9765d77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: もらった手作りチョコがまずい
  type: MusicAlbum
  date published: 2021-07-17
album: このツンデレ！
  type: MusicAlbum
  date published: 2021-11-20
  track: このツンデレ！
    type: MusicRecording
    duration: PT2M47S
    duration ms: 167999
    explicit: false
    by artist: Naka-Dai
    in album: このツンデレ！
      type: MusicAlbum
      date published: 2021-11-20
    genre: vocaloid
    isrc code: JPE562117328
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T22:35:54+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfcfb9e0d1aa721749350c0cfed943271c890076537106d981f9a39d9538a5d77
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958943
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958943
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE562117328
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T01:39:22Z
    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 0xfcfb9e0d1aa721749350c0cfed943271c890076537106d981f9a39d9538a5d77. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:22Z), 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/JPE562117328.
      date published: 2026-07-21T01:39:22Z
    audio: このツンデレ！
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 154.964
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.573
      additional property: Energy
        type: PropertyValue
        value: 0.894
      additional property: Speechiness
        type: PropertyValue
        value: 0.107
      additional property: Acousticness
        type: PropertyValue
        value: 0.018
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.3
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.307
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.65
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: バーカ！
  type: MusicAlbum
  date published: 2022-04-23
album: 倒れる二歩手前までガンバレ！
  type: MusicAlbum
  date published: 2022-07-09
album: 彼氏のフリしてくれない？
  type: MusicAlbum
  date published: 2022-08-06
album: 旅立つキミに贈る歌
  type: MusicAlbum
  date published: 2022-09-10
album: この＊＊＊＊！
  type: MusicAlbum
  date published: 2022-11-12
album: 1234！123！
  type: MusicAlbum
  date published: 2023-03-25
album: キミなら家にあげても大丈夫！
  type: MusicAlbum
  date published: 2023-05-06
album: 光と影
  type: MusicAlbum
  date published: 2023-07-29
album: ナッツ・クラッカー
  type: MusicAlbum
  date published: 2023-12-09
album: オレ、人見知り
  type: MusicAlbum
  date published: 2024-04-13
album: Lost Summer
  type: MusicAlbum
  date published: 2024-08-03
album: オレの寝てるそばで恋バナするな！
  type: MusicAlbum
  date published: 2025-04-26
album: 楽しんで作ろう！
  type: MusicAlbum
  date published: 2025-08-16
album: New Tales
  type: MusicAlbum
  date published: 2025-11-15