杏ノ雲
type: MusicGroup
genre: vocaloid
popularity: 7
followers: 376
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbf3c513c78e716b9da89917a57efc5a68b1645817deb6987456514e961ff5532
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953847
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953847
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/019d386d-1da6-460e-a963-09d7181d4c9d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/019d386d-1da6-460e-a963-09d7181d4c9d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/019d386d-1da6-460e-a963-09d7181d4c9d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:51:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbf3c513c78e716b9da89917a57efc5a68b1645817deb6987456514e961ff5532","name":"杏ノ雲","registered_at":"2026-06-15T14:03:41Z","symbol":"NIM0731078","token_address":"0x81bbad75ccfa5ae165204befe312ab34003e8ecc","type":"artist","uuid":"019d386d-1da6-460e-a963-09d7181d4c9d"}
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 0xbf3c513c78e716b9da89917a57efc5a68b1645817deb6987456514e961ff5532. Chain 2 (Bitcoin): anchored in block 953847 (2026-06-15T22:51:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/019d386d-1da6-460e-a963-09d7181d4c9d.json and https://artists.proofprofile.net/proofs/artist/019d386d-1da6-460e-a963-09d7181d4c9d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:51:00Z
  text: {"copyright_id":"0xbf3c513c78e716b9da89917a57efc5a68b1645817deb6987456514e961ff5532","name":"杏ノ雲","registered_at":"2026-06-15T14:03:41Z","symbol":"NIM0731078","token_address":"0x81bbad75ccfa5ae165204befe312ab34003e8ecc","type":"artist","uuid":"019d386d-1da6-460e-a963-09d7181d4c9d"}
album: 君の最期に
  type: MusicAlbum
  date published: 2024-01-17
  track: 沈殿
    type: MusicRecording
    duration: PT3M33S
    duration ms: 213214
    explicit: false
    by artist: 杏ノ雲
    in album: 君の最期に
      type: MusicAlbum
      date published: 2024-01-17
    genre: vocaloid
    isrc code: TCJPY2485231
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T02:31:18+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2c42341a6c8ef2d4c916b04db8029b416a12c5751e215cdf0a45a038a0e9cfed
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958484
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958484
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2485231
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T03:34:53Z
    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 0x2c42341a6c8ef2d4c916b04db8029b416a12c5751e215cdf0a45a038a0e9cfed. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPY2485231.
      date published: 2026-07-18T03:34:53Z
    audio: 沈殿
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 112.01
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.617
      additional property: Energy
        type: PropertyValue
        value: 0.906
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.005
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.016
      additional property: Liveness
        type: PropertyValue
        value: 0.349
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.359
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.197
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: canvas
  type: MusicAlbum
  date published: 2025-03-22
album: あの夏の旋律へ
  type: MusicAlbum
  date published: 2025-11-01