Takuma
type: MusicGroup
description: Takuma (written: 拓磨, 拓真, 拓馬, 琢磨, 匠馬, 卓磨, 卓真 or 卓馬) is a masculine Japanese given name. Notable people with the name include: , Japanese footballer , Japanese baseball player , Japanese motorcycle rac
popularity: 36
followers: 464
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc06a387a26d80080bd9d6f2071eb329f24ac8e05c596a870be94b810dfdf8651
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f52d2d19-0e9b-40a0-ad57-26dd45a9c3fc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f52d2d19-0e9b-40a0-ad57-26dd45a9c3fc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f52d2d19-0e9b-40a0-ad57-26dd45a9c3fc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
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 0xc06a387a26d80080bd9d6f2071eb329f24ac8e05c596a870be94b810dfdf8651. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f52d2d19-0e9b-40a0-ad57-26dd45a9c3fc.json and https://artists.proofprofile.net/proofs/artist/f52d2d19-0e9b-40a0-ad57-26dd45a9c3fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
album: love&peace(HIGHSCHOOLSINGER.JP)
  type: MusicAlbum
  date published: 2016-03-09
album: Algorab
  type: MusicAlbum
  date published: 2017-04-14
album: EIGA
  type: MusicAlbum
  date published: 2018-11-22
album: Bad boy
  type: MusicAlbum
  date published: 2022-12-18
album: Hot Box
  type: MusicAlbum
  date published: 2023-05-20
album: Hustle&Flow
  type: MusicAlbum
  date published: 2023-10-13
album: hidane (feat. Na-ri & TENMA)
  type: MusicAlbum
  date published: 2024-03-06
album: LIFE is GAMBL
  type: MusicAlbum
  date published: 2025-05-17
track: DA NA NA
  type: MusicRecording
  duration: PT1M42S
  duration ms: 102240
  explicit: false
  by artist: TOTALFAT
  by artist: Takuma
  in album: THE BEST FAT COLLECTION
    type: MusicAlbum
    date published: 2013-12-11
  genre: skate-punk
  genre: melodic-hardcore
  genre: j-rock
  isrc code: JPKS01301988
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-08T19:23:43+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf0d199365372203ccea6d8a563be7da5e9f39e71005a2708db072b006bc0c053
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 953520
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/953520
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01301988
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T13:32:09Z
  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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d199365372203ccea6d8a563be7da5e9f39e71005a2708db072b006bc0c053. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPKS01301988.
    date published: 2026-06-13T13:32:09Z
  audio: DA NA NA
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 129.929
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.509
    additional property: Energy
      type: PropertyValue
      value: 0.996
    additional property: Speechiness
      type: PropertyValue
      value: 0.15
    additional property: Acousticness
      type: PropertyValue
      value: 0
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.047
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.273
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.405
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Jamaica Ska - feat.キヨサク(MONGOL800)& TAKUMA(10-FEET)
  type: MusicRecording
  duration: PT3M54S
  duration ms: 234033
  explicit: false
  by artist: Tokyo Ska Paradise Orchestra
  by artist: キヨサク
  by artist: Takuma
  in album: ツギハギカラフル
    type: MusicAlbum
    date published: 2019-11-20
  isrc code: JPB601903360
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-25T08:48:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x790b2f492505e08979a2824dd1dfb566bc59ce8eb651f48c3ba9b0f6251d078d
  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/JPB601903360
  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 0x790b2f492505e08979a2824dd1dfb566bc59ce8eb651f48c3ba9b0f6251d078d. 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/JPB601903360.
    date published: 2026-07-02T03:55:08Z
  audio: Jamaica Ska - feat.キヨサク(MONGOL800)& TAKUMA(10-FEET)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 158.058
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    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

Time Signature
type: PropertyValue
value: 5

Danceability
type: PropertyValue
value: 0.674

Energy
type: PropertyValue
value: 0.838

Speechiness
type: PropertyValue
value: 0.216

Acousticness
type: PropertyValue
value: 0.004

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.075

Valence (Positivity)
type: PropertyValue
value: 0.839

Loudness (dB)
type: PropertyValue
value: -9.797

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major