O'CHAWANZ
type: MusicGroup
genre: shibuya-kei
popularity: 4
followers: 1375
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4613d7e92d9e3ccd5e9a122ef39d5e35d1dbcc91390b02e8c2cc1134f7373c47
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/eb9cc493-bef4-42a9-9056-e80cf0f57b12.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/eb9cc493-bef4-42a9-9056-e80cf0f57b12.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/eb9cc493-bef4-42a9-9056-e80cf0f57b12
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4613d7e92d9e3ccd5e9a122ef39d5e35d1dbcc91390b02e8c2cc1134f7373c47. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb9cc493-bef4-42a9-9056-e80cf0f57b12.json and https://artists.proofprofile.net/proofs/artist/eb9cc493-bef4-42a9-9056-e80cf0f57b12.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
album: Lo-Fi Hiphop Works
  type: MusicAlbum
  date published: 2021-12-15
album: Do The Right Thing
  type: MusicAlbum
  date published: 2021-04-06
album: Collabo
  type: MusicAlbum
  date published: 2020-10-21
  track: LOVE LETTER RETURNS (feat. 3776)
    type: MusicRecording
    duration: PT3M15S
    duration ms: 195135
    explicit: false
    by artist: O'CHAWANZ
    by artist: 3776
    in album: Collabo
      type: MusicAlbum
      date published: 2020-10-21
    genre: alt-idol
    genre: j-pop-girl-group
    isrc code: TCJPP2164010
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-24T23:12:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x59e9136a0837d291b5c39f82fb7e1fbd5cf02aaadc8b0f818ec7a30a76a7e021
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956304
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956304
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPP2164010
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-02T03:55:08Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e9136a0837d291b5c39f82fb7e1fbd5cf02aaadc8b0f818ec7a30a76a7e021. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPP2164010.
      date published: 2026-07-02T03:55:08Z
    audio: LOVE LETTER RETURNS (feat. 3776)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.486
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.826
      additional property: Energy
        type: PropertyValue
        value: 0.914
      additional property: Speechiness
        type: PropertyValue
        value: 0.065
      additional property: Acousticness
        type: PropertyValue
        value: 0.407
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.1
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.39
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.257
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Mellow Madness
  type: MusicAlbum
  date published: 2020-05-27
album: EPISODE V
  type: MusicAlbum
  date published: 2018-08-15
album: 今夜はブギー・バック (nice vocal)
  type: MusicAlbum
  date published: 2022-03-25
album: Episode X
  type: MusicAlbum
  date published: 2022-03-09
album: OTSUKARESAMA
  type: MusicAlbum
  date published: 2017-03-22
album: 8 DAYS A WEEK (7 DAYS FOCUS Remix) [feat. O'CHAWANZ]
  type: MusicAlbum
  date published: 2019-06-28
album: QUESTION?
  type: MusicAlbum
  date published: 2017-05-24