Masahiro Sengoku
type: MusicGroup
genre: japanese indie
genre: j-r&b
popularity: 8
followers: 506
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7ee14d2c93bb391bdc2a77d3743b9487ec9a4ec3585e1ed13a093956b663926f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954729
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954729
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fb8ac9d3-13ca-4ec9-9579-a4e7611e0799.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fb8ac9d3-13ca-4ec9-9579-a4e7611e0799.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fb8ac9d3-13ca-4ec9-9579-a4e7611e0799
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:16:07Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7ee14d2c93bb391bdc2a77d3743b9487ec9a4ec3585e1ed13a093956b663926f","name":"Masahiro Sengoku","registered_at":"2026-06-21T17:35:09Z","symbol":"NIM1989259","token_address":"0x0737cfa36b9f0fd1070cd6beea87a58c47d319c2","type":"artist","uuid":"fb8ac9d3-13ca-4ec9-9579-a4e7611e0799"}
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 0x7ee14d2c93bb391bdc2a77d3743b9487ec9a4ec3585e1ed13a093956b663926f. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb8ac9d3-13ca-4ec9-9579-a4e7611e0799.json and https://artists.proofprofile.net/proofs/artist/fb8ac9d3-13ca-4ec9-9579-a4e7611e0799.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:16:07Z
  text: {"copyright_id":"0x7ee14d2c93bb391bdc2a77d3743b9487ec9a4ec3585e1ed13a093956b663926f","name":"Masahiro Sengoku","registered_at":"2026-06-21T17:35:09Z","symbol":"NIM1989259","token_address":"0x0737cfa36b9f0fd1070cd6beea87a58c47d319c2","type":"artist","uuid":"fb8ac9d3-13ca-4ec9-9579-a4e7611e0799"}
album: What Is Love
  type: MusicAlbum
  date published: 2020-03-19
album: RESTER
  type: MusicAlbum
  date published: 2021-02-10
album: S.I.R
  type: MusicAlbum
  date published: 2021-05-22
album: S.I.R (Bousi Studio Remix)
  type: MusicAlbum
  date published: 2022-07-06
album: La La La
  type: MusicAlbum
  date published: 2022-08-10
album: MUGEN
  type: MusicAlbum
  date published: 2022-09-07
album: Mist
  type: MusicAlbum
  date published: 2025-03-19
album: Mist
  type: MusicAlbum
  date published: 2025-03-19
album: Muse
  type: MusicAlbum
  date published: 2025-07-23
album: Muse
  type: MusicAlbum
  date published: 2025-07-23
album: Melt & Flow
  type: MusicAlbum
  date published: 2025-10-29
album: Melt & Flow
  type: MusicAlbum
  date published: 2025-10-29
track: Azami
  type: MusicRecording
  duration: PT3M34S
  duration ms: 214000
  explicit: false
  by artist: FLEUR
  by artist: Masahiro Sengoku
  by artist: ZIW
  in album: FOREVER FOREVER
    type: MusicAlbum
    date published: 2023-05-17
  genre: japanese-r-b
  isrc code: JPY492300069
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T07:20:47+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4b64d2d2a8ca1b767ee8ed0cd96edc29f960c88c94239cd1c2c09e372a7564a8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960368
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960368
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY492300069
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T08:26:41Z
  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 0x4b64d2d2a8ca1b767ee8ed0cd96edc29f960c88c94239cd1c2c09e372a7564a8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPY492300069.
    date published: 2026-07-31T08:26:41Z
  audio: Azami
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 111.193
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.725
    additional property: Energy
      type: PropertyValue
      value: 0.561
    additional property: Speechiness
      type: PropertyValue
      value: 0.348
    additional property: Acousticness
      type: PropertyValue
      value: 0.49
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.294
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.864
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.944
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Midnight Whisper - feat. Masahiro Sengoku
  type: MusicRecording
  duration: PT2M56S
  duration ms: 176000
  explicit: false
  by artist: RiE MORRiS
  by artist: Masahiro Sengoku
  in album: Midnight Whisper (feat. Masahiro Sengoku)
    type: MusicAlbum
    date published: 2022-08-17
  genre: japanese-r-b
  isrc code: JPG102201072
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-20T09:32:56+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x583580cca2bd6c4647d5c9496202cd1d48b129be257f45bb36cb3802e5bc0703
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102201072
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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
  audio: Midnight Whisper - feat. Masahiro Sengoku
track: Fiction

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583580cca2bd6c4647d5c9496202cd1d48b129be257f45bb36cb3802e5bc0703. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPG102201072.
date published: 2026-07-02T03:30:09Z

Midnight Whisper - feat. Masahiro Sengoku
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 111.229
additional property: Musical Key
  type: PropertyValue
  value: 11
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.693
additional property: Energy
  type: PropertyValue
  value: 0.496
additional property: Speechiness
  type: PropertyValue
  value: 0.125
additional property: Acousticness
  type: PropertyValue
  value: 0.613
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.144
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.444
additional property: Loudness (dB)
  type: PropertyValue
  value: -11.777
additional property: Key Name
  type: PropertyValue
  value: B
additional property: Mode Name
  type: PropertyValue
  value: Minor

Fiction
type: MusicRecording
duration: PT3M33S
duration ms: 213733
explicit: false
by artist: FKD
by artist: Masahiro Sengoku
in album: Fiction
  type: MusicAlbum
  date published: 2023-12-20
genre: j-rap
genre: j-r-b
isrc code: TCJPY2331507
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T15:39:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa5b79c0cf9a4065c3b3d8f3e0ec8fc44017415a7807914aa5d54eff52dff15cd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2331507
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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 0xa5b79c0cf9a4065c3b3d8f3e0ec8fc44017415a7807914aa5d54eff52dff15cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPY2331507.
  date published: 2026-07-08T03:20:19Z
audio: Fiction
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 109.187
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.825
  additional property: Energy
    type: PropertyValue
    value: 0.283
  additional property: Speechiness
    type: PropertyValue
    value: 0.35
  additional property: Acousticness
    type: PropertyValue
    value: 0.279
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.135
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.498
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.2
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor