twenty4-7
type: MusicGroup
genre: j-pop
genre: j-rap
genre: j-r&b
popularity: 27
followers: 19940
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd37f59fcb03d6691c30b2f29e299918bd90da055b800163cb8385de50bb5db0b
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/5aaea187-0c58-40e7-9b7b-6340937592c5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5aaea187-0c58-40e7-9b7b-6340937592c5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5aaea187-0c58-40e7-9b7b-6340937592c5
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37f59fcb03d6691c30b2f29e299918bd90da055b800163cb8385de50bb5db0b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5aaea187-0c58-40e7-9b7b-6340937592c5.json and https://artists.proofprofile.net/proofs/artist/5aaea187-0c58-40e7-9b7b-6340937592c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
album: Fly Out
  type: MusicAlbum
  date published: 2007-08-29
album: Endless Road
  type: MusicAlbum
  date published: 2007-11-21
  track: Endless Road
    type: MusicRecording
    duration: PT4M24S
    duration ms: 264866
    explicit: false
    by artist: twenty4-7
    in album: Endless Road
      type: MusicAlbum
      date published: 2007-11-21
    genre: j-pop
    genre: j-rap
    genre: j-r&b
    isrc code: JPB600761501
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T22:32:39+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x10ecb12ea0608daaef596d2d0723399161147b12fe2fd0d29b80f37674f4b7b1
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958340
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958340
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB600761501
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T00:53:26Z
    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 0x10ecb12ea0608daaef596d2d0723399161147b12fe2fd0d29b80f37674f4b7b1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPB600761501.
      date published: 2026-07-17T00:53:26Z
    audio: Endless Road
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.947
      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: 0.668
      additional property: Energy
        type: PropertyValue
        value: 0.684
      additional property: Speechiness
        type: PropertyValue
        value: 0.025
      additional property: Acousticness
        type: PropertyValue
        value: 0.151
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.112
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.325
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.859
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Life
  type: MusicAlbum
  date published: 2008-02-20
album: summer story
  type: MusicAlbum
  date published: 2008-07-16
  track: summer story
    type: MusicRecording
    duration: PT4M36S
    duration ms: 276400
    explicit: false
    by artist: twenty4-7
    in album: summer story
      type: MusicAlbum
      date published: 2008-07-16
    genre: j-pop
    genre: j-rap
    genre: j-r&b
    isrc code: JPB600832501
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T12:57:28+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5a5f7e973d602b918cbfb814c6bd0ae6e46f1968ade3a67fbcc4bf7396a3fb4a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958300
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958300
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB600832501
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T16:14:30Z
    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 0x5a5f7e973d602b918cbfb814c6bd0ae6e46f1968ade3a67fbcc4bf7396a3fb4a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPB600832501.
      date published: 2026-07-16T16:14:30Z
    audio: summer story
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.994
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.587
      additional property: Energy
        type: PropertyValue
        value: 0.791
      additional property: Speechiness
        type: PropertyValue
        value: 0.024
      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: Back AGAIN - the black crown ep -
album: BELIEVE - the white cross ep -
album: Get A Life ～Again～
album: PROGRESS
album: Shake
album: ONE
album: Letter ～10年後の君へ～ / 愛の色
album: BEST OF twenty4-7
album: 心
album: Last Message

Acousticness
type: PropertyValue
value: 0.035

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.188

Valence (Positivity)
type: PropertyValue
value: 0.546

Loudness (dB)
type: PropertyValue
value: -3.486

Key Name
type: PropertyValue
value: B

Mode Name
type: PropertyValue
value: Minor

Back AGAIN - the black crown ep -
type: MusicAlbum
date published: 2008-11-05

BELIEVE - the white cross ep -
type: MusicAlbum
date published: 2008-12-03

Get A Life ～Again～
type: MusicAlbum
date published: 2009-02-04

PROGRESS
type: MusicAlbum
date published: 2009-02-18
track: AMAZING
  type: MusicRecording
  duration: PT3M38S
  duration ms: 218413
  explicit: false
  by artist: twenty4-7
  in album: PROGRESS
    type: MusicAlbum
    date published: 2009-02-18
  genre: j-pop
  genre: j-rap
  genre: j-r&b
  isrc code: JPB600832502
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T21:58:33+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xdc1de855d50b33935f09600e47404632c0a05349acc3a9d1f8a0ff718acebc0f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958935
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958935
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB600832502
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T22:08:19Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1de855d50b33935f09600e47404632c0a05349acc3a9d1f8a0ff718acebc0f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPB600832502.
    date published: 2026-07-20T22:08:19Z
  audio: AMAZING
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 116.022
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.643
    additional property: Energy
      type: PropertyValue
      value: 0.876
    additional property: Speechiness
      type: PropertyValue
      value: 0.046
    additional property: Acousticness
      type: PropertyValue
      value: 0.061
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.051
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.756
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.191
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Back AGAIN
  type: MusicRecording
  duration: PT4M18S
  duration ms: 258546
  explicit: false
  by artist: twenty4-7
  in album: PROGRESS
    type: MusicAlbum
    date published: 2009-02-18
  genre: j-pop
  genre: j-rap
  genre: j-r&b
  isrc code: JPB600857901
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T01:56:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf5398bda72c17e8897665e9a78bb3031d017b2493e4aafe7f751679b2af350cc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958805
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958805
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB600857901
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T04:59:59Z
  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 0xf5398bda72c17e8897665e9a78bb3031d017b2493e4aafe7f751679b2af350cc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:59Z), 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/JPB600857901.
    date published: 2026-07-20T04:59:59Z
  audio: Back AGAIN
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 159.997
    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.683
    additional property: Energy
      type: PropertyValue
      value: 0.944
    additional property: Speechiness
      type: PropertyValue
      value: 0.053
    additional property: Acousticness
      type: PropertyValue
      value: 0.176
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.039
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.96
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.8
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Shake
type: MusicAlbum
date published: 2009-07-08

ONE
type: MusicAlbum
date published: 2010-02-24
track: Together
  type: MusicRecording
  duration: PT4M16S
  duration ms: 256906
  explicit: false
  by artist: twenty4-7
  in album: ONE
    type: MusicAlbum
    date published: 2010-02-24
  genre: j-pop
  genre: j-rap
  genre: j-r&b
  isrc code: JPB601002114
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T22:24:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4dd8ca7032d57b8abf38d30d230e606c4a152ce1cfe43e94ecd6a6cfbc7e82df
  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/JPB601002114
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd8ca7032d57b8abf38d30d230e606c4a152ce1cfe43e94ecd6a6cfbc7e82df. 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/JPB601002114.
    date published: 2026-07-05T01:12:41Z
  audio: Together
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 182.137
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.566
    additional property: Energy
      type: PropertyValue
      value: 0.793
    additional property: Speechiness
      type: PropertyValue
      value: 0.039
    additional property: Acousticness
      type: PropertyValue
      value: 0.237
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.049
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.73
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.283
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Letter ～10年後の君へ～ / 愛の色
type: MusicAlbum
date published: 2010-11-10

BEST OF twenty4-7
type: MusicAlbum
date published: 2010-12-01

心
type: MusicAlbum
date published: 2011-01-26

Last Message
type: MusicAlbum
date published: 2012-04-04
track: Last Message ～卒業～
  type: MusicRecording
  duration: PT5M2S
  duration ms: 302186
  explicit: false
  by artist: twenty4-7
  in album: Last Message
    type: MusicAlbum
    date published: 2012-04-04
  genre: j-pop
  genre: j-rap
  genre: j-r&b
  isrc code: JPB601210602
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T02:26:33+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x5758f1cafdc0a09354165a40b915780ce19520dac40024138d4e3dcad4d038e4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956656
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956656
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB601210602
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T14:03:39Z
  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 0x5758f1cafdc0a09354165a40b915780ce19520dac40024138d4e3dcad4d038e4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPB601210602.
    date published: 2026-07-04T14:03:39Z
  audio: Last Message ～卒業～
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 95.012
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.673
    additional property: Energy
      type: PropertyValue
      value: 0.861
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.078
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.112
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.625
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.9
    additional property: Key Name
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    additional property: Mode Name
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track: Sayonara
  type: MusicRecording
  duration: PT4M39S
  duration ms: 279293
  explicit: false
  by artist: twenty4-7
  in album: Last Message
    type: MusicAlbum
    date published: 2012-04-04
  genre: j-pop
  genre: j-rap
  genre: j-r&b
  isrc code: JPB601063802
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T18:16:52+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x327219d3c8847a10ae80f5115d6d5e92c4e88372b9dc4592a9609bd45c4ef685
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958770
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958770
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB601063802
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T21:12:14Z
  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 0x327219d3c8847a10ae80f5115d6d5e92c4e88372b9dc4592a9609bd45c4ef685. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:14Z), 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/JPB601063802.
    date published: 2026-07-19T21:12:14Z
  audio: Sayonara
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 165.952
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.641
    additional property: Energy
      type: PropertyValue
      value: 0.837
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.213
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.093
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.772
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.125
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major