Def Will
type: MusicGroup
genre: j-dance
genre: j-pop
genre: j-r&b
popularity: 7
followers: 1244
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8cb07e016872d75c00d870e155cf7362b82a6ac5211163c3ae66b89ae595ccc8
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/ef40ba19-0342-4fd6-ae39-6fcb08bb586d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef40ba19-0342-4fd6-ae39-6fcb08bb586d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ef40ba19-0342-4fd6-ae39-6fcb08bb586d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8cb07e016872d75c00d870e155cf7362b82a6ac5211163c3ae66b89ae595ccc8","name":"Def Will","registered_at":"2026-06-21T12:28:06Z","symbol":"NIM1922890","token_address":"0xadc39c0612c53aef2f9b8bec7d3e5143dbcd2ae1","type":"artist","uuid":"ef40ba19-0342-4fd6-ae39-6fcb08bb586d"}
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 0x8cb07e016872d75c00d870e155cf7362b82a6ac5211163c3ae66b89ae595ccc8. 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/ef40ba19-0342-4fd6-ae39-6fcb08bb586d.json and https://artists.proofprofile.net/proofs/artist/ef40ba19-0342-4fd6-ae39-6fcb08bb586d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x8cb07e016872d75c00d870e155cf7362b82a6ac5211163c3ae66b89ae595ccc8","name":"Def Will","registered_at":"2026-06-21T12:28:06Z","symbol":"NIM1922890","token_address":"0xadc39c0612c53aef2f9b8bec7d3e5143dbcd2ae1","type":"artist","uuid":"ef40ba19-0342-4fd6-ae39-6fcb08bb586d"}
album: Lovely Day
  type: MusicAlbum
  date published: 2016-07-02
album: Winding Road
  type: MusicAlbum
  date published: 2017-02-08
album: Winding Road
  type: MusicAlbum
  date published: 2017-02-08
  track: Winding Road - メイン
    type: MusicRecording
    duration: PT4M14S
    duration ms: 254067
    explicit: false
    by artist: Def Will
    in album: Winding Road
      type: MusicAlbum
      date published: 2017-02-08
    genre: j-dance
    genre: j-pop
    genre: j-r&b
    isrc code: JPB601700206
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T16:37:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa1642dc786e072059a1a773ed03890dc282ee49afab1c085f41c0258359e3e24
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB601700206
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0xa1642dc786e072059a1a773ed03890dc282ee49afab1c085f41c0258359e3e24. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPB601700206.
      date published: 2026-07-05T01:12:41Z
    audio: Winding Road - メイン
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.006
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.621
      additional property: Energy
        type: PropertyValue
        value: 0.909
      additional property: Speechiness
        type: PropertyValue
        value: 0.043
      additional property: Acousticness
        type: PropertyValue
        value: 0.056
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.486
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.446
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.988
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: あなたという明日
  type: MusicAlbum
  date published: 2017-03-14
album: Baby baby baby
  type: MusicAlbum
  date published: 2018-02-14
  track: Baby baby baby
    type: MusicRecording
    duration: PT4M27S
    duration ms: 267087
    explicit: false
    by artist: Def Will
    in album: Baby baby baby
      type: MusicAlbum
      date published: 2018-02-14
    genre: j-dance
    genre: j-pop
    genre: j-r&b
    isrc code: JPB601800522
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T23:19:18+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3cb1c6f335b618999c54bde2d8bce00e35c5d4eab0cf75721384738e43965e0b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB601800522
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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 0x3cb1c6f335b618999c54bde2d8bce00e35c5d4eab0cf75721384738e43965e0b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPB601800522.
      date published: 2026-07-06T01:25:57Z
    audio: Baby baby baby
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 175.92
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.585
      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: 寒い夜だから・・・
album: Overnight Sensation 〜時代はあなたに委ねてる〜
album: Lady Generation
album: Def Will

Energy
type: PropertyValue
value: 0.89

Speechiness
type: PropertyValue
value: 0.047

Acousticness
type: PropertyValue
value: 0.019

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.085

Valence (Positivity)
type: PropertyValue
value: 0.787

Loudness (dB)
type: PropertyValue
value: -4.375

Key Name
type: PropertyValue
value: Eb

Mode Name
type: PropertyValue
value: Major

寒い夜だから・・・
type: MusicAlbum
date published: 2018-02-14

Overnight Sensation 〜時代はあなたに委ねてる〜
type: MusicAlbum
date published: 2018-04-18

Lady Generation
type: MusicAlbum
date published: 2018-04-18

Def Will
type: MusicAlbum
date published: 2018-06-27

Def Will
type: MusicAlbum
date published: 2018-06-27