Kogawa
type: MusicGroup
description: Kogawa (written: 湖川 or 古川) is a Japanese surname. Notable people with the surname include: Joy Kogawa (born 1935), Canadian poet and novelist , Japanese Nordic combined skier , Japanese animator and
popularity: 6
followers: 12
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x86623c022db2e3e912eceeba52d5374dbb6cfb9521d159b2eb6cf5bda8d771ae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c09062f7-5d81-4478-8a21-f98826e593f6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c09062f7-5d81-4478-8a21-f98826e593f6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c09062f7-5d81-4478-8a21-f98826e593f6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
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 0x86623c022db2e3e912eceeba52d5374dbb6cfb9521d159b2eb6cf5bda8d771ae. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c09062f7-5d81-4478-8a21-f98826e593f6.json and https://artists.proofprofile.net/proofs/artist/c09062f7-5d81-4478-8a21-f98826e593f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
album: Contest (Extended Mix)
  type: MusicAlbum
  date published: 2024-04-29
  track: Contest - Extended Mix
    type: MusicRecording
    duration: PT2M20S
    duration ms: 140770
    explicit: false
    by artist: Kogawa
    in album: Contest (Extended Mix)
      type: MusicAlbum
      date published: 2024-04-29
    isrc code: QZS642428732
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T03:29:56+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x82630ff030b2ce00a16b87bdd439c729651cc9f84cb77748e67901bed255d626
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958959
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958959
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS642428732
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:51:22Z
    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 0x82630ff030b2ce00a16b87bdd439c729651cc9f84cb77748e67901bed255d626. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZS642428732.
      date published: 2026-07-21T03:51:22Z
    audio: Contest - Extended Mix
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.986
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.858
      additional property: Energy
        type: PropertyValue
        value: 0.482
      additional property: Speechiness
        type: PropertyValue
        value: 0.076
      additional property: Acousticness
        type: PropertyValue
        value: 0.018
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.674
      additional property: Liveness
        type: PropertyValue
        value: 0.072
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.854
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.649
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Last War
  type: MusicAlbum
  date published: 2024-05-03
  track: Last War - Radio Edit
    type: MusicRecording
    duration: PT1M49S
    duration ms: 109975
    explicit: false
    by artist: Kogawa
    in album: Last War
      type: MusicAlbum
      date published: 2024-05-03
    isrc code: DEPI82408460
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T21:38:02+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa59627015e0dace7134fca93553cbdb258a0617e110f88f4149abd06f788c47c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957759
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957759
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82408460
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T21:46:51Z
    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 0xa59627015e0dace7134fca93553cbdb258a0617e110f88f4149abd06f788c47c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82408460.
      date published: 2026-07-12T21:46:51Z
    audio: Last War - Radio Edit
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.981
      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: 0.807
      additional property: Energy
        type: PropertyValue
        value: 0.423
      additional property: Speechiness
        type: PropertyValue
        value: 0.078
      additional property: Acousticness
        type: PropertyValue
        value: 0.113
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.943
      additional property: Liveness
        type: PropertyValue
        value: 0.111
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.496
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Last War
album: Love Love Machine Gun
album: Contest

Loudness (dB)
type: PropertyValue
value: -17.44

Key Name
type: PropertyValue
value: Ab

Mode Name
type: PropertyValue
value: Major

Last War
type: MusicRecording
duration: PT2M5S
duration ms: 125024
explicit: false
by artist: Kogawa
in album: Last War
  type: MusicAlbum
  date published: 2024-05-03
isrc code: DEPI82408461
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T12:17:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7b261627e27d499e3f8f79e85477d13e6754fe51b65fa07810df253c21a56b65
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958415
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958415
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82408461
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T12:50:13Z
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 0x7b261627e27d499e3f8f79e85477d13e6754fe51b65fa07810df253c21a56b65. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEPI82408461.
  date published: 2026-07-17T12:50:13Z
audio: Last War
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 125.98
  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: 0.808
  additional property: Energy
    type: PropertyValue
    value: 0.379
  additional property: Speechiness
    type: PropertyValue
    value: 0.075
  additional property: Acousticness
    type: PropertyValue
    value: 0.108
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.935
  additional property: Liveness
    type: PropertyValue
    value: 0.109
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.285
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.28
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

Love Love Machine Gun
type: MusicAlbum
date published: 2025-09-01

Contest
type: MusicAlbum
date published: 2025-09-26
track: Contest
  type: MusicRecording
  duration: PT2M20S
  duration ms: 140770
  explicit: false
  by artist: Kogawa
  in album: Contest
    type: MusicAlbum
    date published: 2025-09-26
  isrc code: UK6822513276
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T06:48:35+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2ebdf9f31933894f92ccc40ddd873fb3ec7a2e78a707ea9168e94c7fc009bd39
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956889
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956889
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK6822513276
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T06:56:49Z
  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 0x2ebdf9f31933894f92ccc40ddd873fb3ec7a2e78a707ea9168e94c7fc009bd39. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK6822513276.
    date published: 2026-07-06T06:56:49Z
  audio: Contest
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 125.985
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.857
    additional property: Energy
      type: PropertyValue
      value: 0.483
    additional property: Speechiness
      type: PropertyValue
      value: 0.075
    additional property: Acousticness
      type: PropertyValue
      value: 0.017
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.698
    additional property: Liveness
      type: PropertyValue
      value: 0.072
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.867
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.647
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Contest - Radio Edit
  type: MusicRecording
  duration: PT2M5S
  duration ms: 125616
  explicit: false
  by artist: Kogawa
  in album: Contest
    type: MusicAlbum
    date published: 2025-09-26
  isrc code: UK6822513277
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T16:17:08+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x36fd3130a32b9ab74ff58df8a0e6a304cf64e61742b840760526eef8cf983173
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959155
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959155
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK6822513277
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T16:43:41Z
  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 0x36fd3130a32b9ab74ff58df8a0e6a304cf64e61742b840760526eef8cf983173. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/UK6822513277.
    date published: 2026-07-22T16:43:41Z
  audio: Contest - Radio Edit
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 125.995
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.878
    additional property: Energy
      type: PropertyValue
      value: 0.504
    additional property: Speechiness
      type: PropertyValue
      value: 0.071
    additional property: Acousticness
      type: PropertyValue
      value: 0.038
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.592
    additional property: Liveness
      type: PropertyValue
      value: 0.066
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.788
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.791
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor