DA兎
type: MusicGroup
genre: vocaloid
popularity: 3
followers: 165
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7a39342465eaf6375e16e547127c34a9b16333afb6e670f3be0bff49cbd4419e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/50915b2f-785e-47aa-846a-6d0a0c2399dc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/50915b2f-785e-47aa-846a-6d0a0c2399dc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/50915b2f-785e-47aa-846a-6d0a0c2399dc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7a39342465eaf6375e16e547127c34a9b16333afb6e670f3be0bff49cbd4419e","name":"DA兎","registered_at":"2026-06-16T17:35:04Z","symbol":"NIM1125218","token_address":"0xd6386425fe4782445eea6f0ce197c6bbde102006","type":"artist","uuid":"50915b2f-785e-47aa-846a-6d0a0c2399dc"}
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 0x7a39342465eaf6375e16e547127c34a9b16333afb6e670f3be0bff49cbd4419e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50915b2f-785e-47aa-846a-6d0a0c2399dc.json and https://artists.proofprofile.net/proofs/artist/50915b2f-785e-47aa-846a-6d0a0c2399dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x7a39342465eaf6375e16e547127c34a9b16333afb6e670f3be0bff49cbd4419e","name":"DA兎","registered_at":"2026-06-16T17:35:04Z","symbol":"NIM1125218","token_address":"0xd6386425fe4782445eea6f0ce197c6bbde102006","type":"artist","uuid":"50915b2f-785e-47aa-846a-6d0a0c2399dc"}
album: あの日にまだ戻れるのなら
  type: MusicAlbum
  date published: 2024-01-19
album: 神様なんていないって知ったあの日
  type: MusicAlbum
  date published: 2024-01-19
  track: 神様なんていないって知ったあの日
    type: MusicRecording
    duration: PT4M21S
    duration ms: 261000
    explicit: false
    by artist: DA兎
    in album: 神様なんていないって知ったあの日
      type: MusicAlbum
      date published: 2024-01-19
    genre: vocaloid
    isrc code: TCJPY2488195
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T04:46:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1bede772dfc4c8f99c49dcc609f394c76eddf3b80f136f7fa7af6ae584ad6862
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956790
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956790
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2488195
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T12:31:54Z
    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 0x1bede772dfc4c8f99c49dcc609f394c76eddf3b80f136f7fa7af6ae584ad6862. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPY2488195.
      date published: 2026-07-05T12:31:54Z
    audio: 神様なんていないって知ったあの日
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.992
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.822
      additional property: Energy
        type: PropertyValue
        value: 0.471
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.668
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.094
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.742
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.674
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor