北山たけし
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 21
followers: 1590
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc5a6763cdf109a8792dd651509a289aa362e6368474f35621487dfc073387a77
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/d11690a2-f024-48a3-a78a-6d6d03bf2aa1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d11690a2-f024-48a3-a78a-6d6d03bf2aa1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d11690a2-f024-48a3-a78a-6d6d03bf2aa1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc5a6763cdf109a8792dd651509a289aa362e6368474f35621487dfc073387a77","name":"北山たけし","registered_at":"2026-06-12T10:21:48Z","symbol":"NIM0268532","token_address":"0x4ce813a382cd6e526dcb64f8267f8478b236f44d","type":"artist","uuid":"d11690a2-f024-48a3-a78a-6d6d03bf2aa1"}
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 0xc5a6763cdf109a8792dd651509a289aa362e6368474f35621487dfc073387a77. 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/d11690a2-f024-48a3-a78a-6d6d03bf2aa1.json and https://artists.proofprofile.net/proofs/artist/d11690a2-f024-48a3-a78a-6d6d03bf2aa1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xc5a6763cdf109a8792dd651509a289aa362e6368474f35621487dfc073387a77","name":"北山たけし","registered_at":"2026-06-12T10:21:48Z","symbol":"NIM0268532","token_address":"0x4ce813a382cd6e526dcb64f8267f8478b236f44d","type":"artist","uuid":"d11690a2-f024-48a3-a78a-6d6d03bf2aa1"}
album: 片道切符
  type: MusicAlbum
  date published: 2004-04-21
album: 男の出船
  type: MusicAlbum
  date published: 2005-02-25
album: 北山たけしファースト・アルバム 一歩
  type: MusicAlbum
  date published: 2005-07-07
album: 男の拳
  type: MusicAlbum
  date published: 2006-02-22
album: 北山たけし セカンド・アルバム 夢
  type: MusicAlbum
  date published: 2006-07-26
album: ふるさとの夕陽
  type: MusicAlbum
  date published: 2007-02-22
album: 北山たけし サード・アルバム ふるさとの夕陽
  type: MusicAlbum
  date published: 2007-07-11
album: 男鹿半島
  type: MusicAlbum
  date published: 2007-08-29
album: 希望の詩
  type: MusicAlbum
  date published: 2008-04-23
album: 北山たけしベスト・アルバムNo.1
  type: MusicAlbum
  date published: 2008-09-24
  track: 男鹿半島
    type: MusicRecording
    duration: PT4M29S
    duration ms: 269573
    explicit: false
    by artist: 北山たけし
    in album: 北山たけしベスト・アルバムNo.1
      type: MusicAlbum
      date published: 2008-09-24
    genre: enka
    genre: kayokyoku
    isrc code: JPTE00704020
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T18:32:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb973adb26eee93bdb513911753ea17b111056cad5d8ba9c3c2432eb2da3fcc81
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956545
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956545
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE00704020
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T19:59:51Z
    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 0xb973adb26eee93bdb513911753ea17b111056cad5d8ba9c3c2432eb2da3fcc81. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTE00704020.
      date published: 2026-07-03T19:59:51Z
    audio: 男鹿半島
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 152.516
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.277
      additional property: Energy
        type: PropertyValue
        value: 0.589
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.685
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.083
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.304
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.325
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: 剣山(つるぎさん)
  type: MusicAlbum
  date published: 2009-01-21
album: 高千穂峡
  type: MusicAlbum
  date published: 2010-02-24
album: 北山たけし 日本の情景・神話のふる里
  type: MusicAlbum
  date published: 2010-09-22
album: 男のなみだ雨
  type: MusicAlbum
  date published: 2011-01-19
album: 父子(おやこ)の誓い
  type: MusicAlbum
  date published: 2011-09-21
album: 流星カシオペア
  type: MusicAlbum
  date published: 2012-03-21
album: 奥入瀬恋歌
  type: MusicAlbum
  date published: 2012-07-25
  track: 夢去りし街角
    type: MusicRecording
    duration: PT3M46S
    duration ms: 226293
    explicit: false
    by artist: 北山たけし
    in album: 奥入瀬恋歌
      type: MusicAlbum
      date published: 2012-07-25
    genre: enka
    genre: kayokyoku
    isrc code: JPTE01203080
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T08:53:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf233b572f75a3a4cebecdf26eccebbfebdb1bb64e902a30e67192a06c660c7ec
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: 夢去りし街角
album: 雨の裏町
album: 路地あかり
album: デビュー10周年記念オリジナルアルバム～数えきれない想い～
album: 白夜の狼
album: 有明海
album: かたくりの花
album: 流れ雲
album: 霧笛の酒場
album: アカシアの街で
album: 津軽おとこ節
album: 北山たけし2019年全曲集
album: 手紙
album: 龍神海峡
album: 北山たけし 2021年全曲集
album: 龍神海峡 (追撃盤)
album: 風物語
album: 風物語（追撃盤）
album: 北山たけし 2022年全曲集
album: 博多ぶるーす
album: さすらいの街
album: 夏の終わりが来る前に
album: 月うるる
album: 紫陽花のひと

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956634

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE01203080

OTSTimestamp
type: PropertyValue
value: 2026-07-04T10:04:33Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233b572f75a3a4cebecdf26eccebbfebdb1bb64e902a30e67192a06c660c7ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPTE01203080.
date published: 2026-07-04T10:04:33Z

夢去りし街角
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 121.974
additional property: Musical Key
  type: PropertyValue
  value: 4
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.707
additional property: Energy
  type: PropertyValue
  value: 0.616
additional property: Speechiness
  type: PropertyValue
  value: 0.032
additional property: Acousticness
  type: PropertyValue
  value: 0.545
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.1
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.63
additional property: Loudness (dB)
  type: PropertyValue
  value: -7.327
additional property: Key Name
  type: PropertyValue
  value: E
additional property: Mode Name
  type: PropertyValue
  value: Major

雨の裏町
type: MusicAlbum
date published: 2012-09-19

路地あかり
type: MusicAlbum
date published: 2013-04-24

デビュー10周年記念オリジナルアルバム～数えきれない想い～
type: MusicAlbum
date published: 2013-08-21

白夜の狼
type: MusicAlbum
date published: 2013-09-18

有明海
type: MusicAlbum
date published: 2014-04-23

かたくりの花
type: MusicAlbum
date published: 2015-03-18

流れ雲
type: MusicAlbum
date published: 2016-02-24

霧笛の酒場
type: MusicAlbum
date published: 2016-11-16

アカシアの街で
type: MusicAlbum
date published: 2017-09-20

津軽おとこ節
type: MusicAlbum
date published: 2018-04-04

北山たけし2019年全曲集
type: MusicAlbum
date published: 2018-10-17
track: 有明海
  type: MusicRecording
  duration: PT4M47S
  duration ms: 287546
  explicit: false
  by artist: 北山たけし
  in album: 北山たけし2019年全曲集
    type: MusicAlbum
    date published: 2018-10-17
  genre: enka
  genre: kayokyoku
  isrc code: JPTE01400510
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T10:20:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8b1615be309391f958d9bcee359036c7c465e335a567fab15454770fb814e86b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958397
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958397
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE01400510
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T10:29:45Z
  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 0x8b1615be309391f958d9bcee359036c7c465e335a567fab15454770fb814e86b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPTE01400510.
    date published: 2026-07-17T10:29:45Z
  audio: 有明海
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 145.837
    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: 0.345
    additional property: Energy
      type: PropertyValue
      value: 0.594
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.563
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.177
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.401
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.508
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major

手紙
type: MusicAlbum
date published: 2019-02-25

龍神海峡
type: MusicAlbum
date published: 2020-02-12

北山たけし 2021年全曲集
type: MusicAlbum
date published: 2020-09-16

龍神海峡 (追撃盤)
type: MusicAlbum
date published: 2020-09-30

風物語
type: MusicAlbum
date published: 2021-04-21

風物語（追撃盤）
type: MusicAlbum
date published: 2021-06-16

北山たけし 2022年全曲集
type: MusicAlbum
date published: 2021-10-20

博多ぶるーす
type: MusicAlbum
date published: 2022-02-23
track: 博多ぶるーす
  type: MusicRecording
  duration: PT4M49S
  duration ms: 289946
  explicit: false
  by artist: 北山たけし
  in album: 博多ぶるーす
    type: MusicAlbum
    date published: 2022-02-23
  genre: enka
  genre: kayokyoku
  isrc code: JPTE02107530
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T05:59:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc1cd629d283709dd3f06d13e57ba48437baab4085703a6356330beec5b52e4e4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958251
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958251
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE02107530
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T06:29:25Z
  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 0xc1cd629d283709dd3f06d13e57ba48437baab4085703a6356330beec5b52e4e4. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/JPTE02107530.
    date published: 2026-07-16T06:29:25Z
  audio: 博多ぶるーす
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 119.796
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.501
    additional property: Energy
      type: PropertyValue
      value: 0.675
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.749
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.192
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.553
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.784
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major

さすらいの街
type: MusicAlbum
date published: 2023-02-22

夏の終わりが来る前に
type: MusicAlbum
date published: 2024-01-17

月うるる
type: MusicAlbum
date published: 2024-11-13

月うるる
type: MusicAlbum
date published: 2024-11-20
track: 夢追い鶴
  type: MusicRecording
  duration: PT4M20S
  duration ms: 260413
  explicit: false
  by artist: 北山たけし
  in album: 月うるる
    type: MusicAlbum
    date published: 2024-11-20
  genre: enka
  genre: kayokyoku
  isrc code: JPTE02404950
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T10:44:13+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x756aa46b905c69b1e18743e66ef228a2d7c3507fbc702533e67f1e430579b3f1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956545
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956545
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTE02404950
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T19:59:51Z
  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 0x756aa46b905c69b1e18743e66ef228a2d7c3507fbc702533e67f1e430579b3f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTE02404950.
    date published: 2026-07-03T19:59:51Z
  audio: 夢追い鶴
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 108.093
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.539
    additional property: Energy
      type: PropertyValue
      value: 0.555
    additional property: Speechiness
      type: PropertyValue
      value: 0.027
    additional property: Acousticness
      type: PropertyValue
      value: 0.701
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.12
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.498
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.24
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor

紫陽花のひと
type: MusicAlbum
date published: 2025-09-17