Kotsu
type: MusicGroup
popularity: 15
followers: 455
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3219ed318b54911eaa201bf3ddfd26b8fcd7cee93954d1235bf4ae6f9220d8ee
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/edfce933-c51e-45ab-a2a0-ab6c9426b026.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/edfce933-c51e-45ab-a2a0-ab6c9426b026.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/edfce933-c51e-45ab-a2a0-ab6c9426b026
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3219ed318b54911eaa201bf3ddfd26b8fcd7cee93954d1235bf4ae6f9220d8ee. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edfce933-c51e-45ab-a2a0-ab6c9426b026.json and https://artists.proofprofile.net/proofs/artist/edfce933-c51e-45ab-a2a0-ab6c9426b026.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T15:41:00Z
album: 街灯
  type: MusicAlbum
  date published: 2021-07-31
  track: 街灯
    type: MusicRecording
    duration: PT5M46S
    duration ms: 346578
    explicit: false
    by artist: Kotsu
    in album: 街灯
      type: MusicAlbum
      date published: 2021-07-31
    isrc code: TCJPP2125634
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T00:49:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xae7f247fcd983e0983965ddec961806231fa78da5d2976e254c6ce8c352b75cf
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958802
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958802
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPP2125634
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T01:04:02Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7f247fcd983e0983965ddec961806231fa78da5d2976e254c6ce8c352b75cf. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPP2125634.
      date published: 2026-07-20T01:04:02Z
    audio: 街灯
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 75.955
      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: 0.507
      additional property: Energy
        type: PropertyValue
        value: 0.535
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.476
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.219
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.591
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.732
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: street light
  type: MusicAlbum
  date published: 2021-07-31
album: bangs
  type: MusicAlbum
  date published: 2022-04-21
album: 前髪
  type: MusicAlbum
  date published: 2022-04-21
album: NAVY (feat. yuya sugawara)
  type: MusicAlbum
  date published: 2023-02-28
album: NAVY (feat. 菅原優也)
  type: MusicAlbum
  date published: 2023-02-28
  track: NAVY (feat. 菅原優也)
    type: MusicRecording
    duration: PT4M23S
    duration ms: 263899
    explicit: false
    by artist: Kotsu
    in album: NAVY (feat. 菅原優也)
      type: MusicAlbum
      date published: 2023-02-28
    isrc code: TCJPU2399515
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T02:08:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa92c8d6a261ee76c6e8d0a4c84c8c215d91aacc12a9de524b908fec354d9de9a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956894
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956894
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPU2399515
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T07:53:57Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92c8d6a261ee76c6e8d0a4c84c8c215d91aacc12a9de524b908fec354d9de9a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPU2399515.
      date published: 2026-07-06T07:53:57Z
    audio: NAVY (feat. 菅原優也)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 75.007
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.648
      additional property: Energy
        type: PropertyValue
        value: 0.403
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.42
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Dear My Princess
album: Don't Stop (feat. Yongi Black)
album: 今夜ここを抜け出して (feat. 山本夜中)
album: let's get out of here tonight (feat. Yonaka Yamamoto)
album: U (feat. myu)
album: Kiss
album: imasara? (feat. 佐藤嘉寿人)
album: now? (feat. kazutosato)
album: 心の番
album: a pair of hearts
album: Starlight
album: maegami
album: gaitou
album: BATON PASS

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.085

Valence (Positivity)
type: PropertyValue
value: 0.603

Loudness (dB)
type: PropertyValue
value: -8.741

Key Name
type: PropertyValue
value: Ab

Mode Name
type: PropertyValue
value: Major

Dear My Princess
type: MusicAlbum
date published: 2023-03-28

Dear My Princess
type: MusicAlbum
date published: 2023-03-28

Don't Stop (feat. Yongi Black)
type: MusicAlbum
date published: 2023-04-22

Don't Stop (feat. Yongi Black)
type: MusicAlbum
date published: 2023-04-22

今夜ここを抜け出して (feat. 山本夜中)
type: MusicAlbum
date published: 2023-08-24

let's get out of here tonight (feat. Yonaka Yamamoto)
type: MusicAlbum
date published: 2023-08-24

U (feat. myu)
type: MusicAlbum
date published: 2024-01-13

U (feat. myu)
type: MusicAlbum
date published: 2024-01-13
track: U (feat. myu)
  type: MusicRecording
  duration: PT2M18S
  duration ms: 138188
  explicit: false
  by artist: Kotsu
  in album: U (feat. myu)
    type: MusicAlbum
    date published: 2024-01-13
  isrc code: TCJPY2482875
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T23:04:54+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x37a8a1f67b2cdef45cdb8e23e6fec2f1eeb258dba43165136df94e0d1f79c14b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958796
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958796
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2482875
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T02:05:12Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a8a1f67b2cdef45cdb8e23e6fec2f1eeb258dba43165136df94e0d1f79c14b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:12Z), 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/TCJPY2482875.
    date published: 2026-07-20T02:05:12Z
  audio: U (feat. myu)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 143.997
    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.587
    additional property: Energy
      type: PropertyValue
      value: 0.563
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.417
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.11
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.253
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.961
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Major

Kiss
type: MusicAlbum
date published: 2024-02-22

Kiss
type: MusicAlbum
date published: 2024-02-22

imasara? (feat. 佐藤嘉寿人)
type: MusicAlbum
date published: 2024-06-04

now? (feat. kazutosato)
type: MusicAlbum
date published: 2024-06-04

心の番
type: MusicAlbum
date published: 2024-07-31

a pair of hearts
type: MusicAlbum
date published: 2024-07-31

Starlight
type: MusicAlbum
date published: 2024-11-26

Starlight
type: MusicAlbum
date published: 2024-11-26

maegami
type: MusicAlbum
date published: 2025-02-26

maegami
type: MusicAlbum
date published: 2025-02-26

gaitou
type: MusicAlbum
date published: 2025-04-18

gaitou
type: MusicAlbum
date published: 2025-04-18

BATON PASS
type: MusicAlbum
date published: 2025-07-09

BATON PASS
type: MusicAlbum
date published: 2025-07-09