What at lazz
type: MusicGroup
genre: vocaloid
popularity: 7
followers: 396
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x57b13d4cd423388ae6a39d7dcc6a157db36f37fb95112eb489806fee4f81bd14
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/6b8a309c-1b16-431a-85d2-de150ba39352.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6b8a309c-1b16-431a-85d2-de150ba39352.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6b8a309c-1b16-431a-85d2-de150ba39352
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x57b13d4cd423388ae6a39d7dcc6a157db36f37fb95112eb489806fee4f81bd14","name":"What at lazz","registered_at":"2026-06-17T03:10:32Z","symbol":"NIM1262522","token_address":"0x11b532f1b40f833be086a487662156bc94091254","type":"artist","uuid":"6b8a309c-1b16-431a-85d2-de150ba39352"}
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 0x57b13d4cd423388ae6a39d7dcc6a157db36f37fb95112eb489806fee4f81bd14. 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/6b8a309c-1b16-431a-85d2-de150ba39352.json and https://artists.proofprofile.net/proofs/artist/6b8a309c-1b16-431a-85d2-de150ba39352.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x57b13d4cd423388ae6a39d7dcc6a157db36f37fb95112eb489806fee4f81bd14","name":"What at lazz","registered_at":"2026-06-17T03:10:32Z","symbol":"NIM1262522","token_address":"0x11b532f1b40f833be086a487662156bc94091254","type":"artist","uuid":"6b8a309c-1b16-431a-85d2-de150ba39352"}
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album: 春に咲く
  type: MusicAlbum
  date published: 2025-02-26
  track: 春に咲く
    type: MusicRecording
    duration: PT2M55S
    duration ms: 175833
    explicit: false
    by artist: What at lazz
    in album: 春に咲く
      type: MusicAlbum
      date published: 2025-02-26
    genre: vocaloid
    isrc code: TCJPD2588377
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T18:46:54+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd4feaae2019e2e0b564c15b2c42b8edec5b897f5c244cc9f6ed08e28010e27e6
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958924
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958924
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPD2588377
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T18:54:07Z
    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 0xd4feaae2019e2e0b564c15b2c42b8edec5b897f5c244cc9f6ed08e28010e27e6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCJPD2588377.
      date published: 2026-07-20T18:54:07Z
    audio: 春に咲く
      type: AudioObject
      additional property: Tempo (BPM)
      additional property: Musical Key
      additional property: Mode (Major/Minor)
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Sky
album: fafafafoundation
album: ふぁふぁふぁふぁんでーしょん
album: パラノイア
album: PARANOIA

Tempo (BPM)
type: PropertyValue
value: 191.342

Musical Key
type: PropertyValue
value: 1

Mode (Major/Minor)
type: PropertyValue
value: 1

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.343

Energy
type: PropertyValue
value: 0.79

Speechiness
type: PropertyValue
value: 0.046

Acousticness
type: PropertyValue
value: 0.002

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.314

Valence (Positivity)
type: PropertyValue
value: 0.603

Loudness (dB)
type: PropertyValue
value: -10.888

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Sky
type: MusicAlbum
date published: 2025-08-15

Sky
type: MusicAlbum
date published: 2025-08-15

fafafafoundation
type: MusicAlbum
date published: 2025-09-26

ふぁふぁふぁふぁんでーしょん
type: MusicAlbum
date published: 2025-09-26

パラノイア
type: MusicAlbum
date published: 2025-10-31

PARANOIA
type: MusicAlbum
date published: 2025-10-31