Mayu Watanabe
type: MusicGroup
genre: c-pop
genre: j-pop
description: is a Japanese retired singer and actress. Nicknamed , her entertainment career was associated with the idol girl group AKB48 under Team B. In the annual AKB48 General Elections event, she had consist
popularity: 19
followers: 25947
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xed656ac1e3fe61695987ad7ed729fe77e735273e76f696c623220ad959af41cc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953625
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953625
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/23b06dc0-8348-4851-8dbd-93f0d164e805.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/23b06dc0-8348-4851-8dbd-93f0d164e805.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/23b06dc0-8348-4851-8dbd-93f0d164e805
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:37:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xed656ac1e3fe61695987ad7ed729fe77e735273e76f696c623220ad959af41cc","name":"Mayu Watanabe","registered_at":"2026-06-14T08:07:38Z","symbol":"NIM0390818","token_address":"0x4c3dd900bc8e4b21e0f7bb96f1654be6b4b24aea","type":"artist","uuid":"23b06dc0-8348-4851-8dbd-93f0d164e805"}
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 0xed656ac1e3fe61695987ad7ed729fe77e735273e76f696c623220ad959af41cc. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23b06dc0-8348-4851-8dbd-93f0d164e805.json and https://artists.proofprofile.net/proofs/artist/23b06dc0-8348-4851-8dbd-93f0d164e805.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:37:06Z
  text: {"copyright_id":"0xed656ac1e3fe61695987ad7ed729fe77e735273e76f696c623220ad959af41cc","name":"Mayu Watanabe","registered_at":"2026-06-14T08:07:38Z","symbol":"NIM0390818","token_address":"0x4c3dd900bc8e4b21e0f7bb96f1654be6b4b24aea","type":"artist","uuid":"23b06dc0-8348-4851-8dbd-93f0d164e805"}
album: シンクロときめき Type-A
  type: MusicAlbum
  date published: 2012-02-29
album: シンクロときめき Type-B
  type: MusicAlbum
  date published: 2012-02-29
album: シンクロときめき Type-A
  type: MusicAlbum
  date published: 2012-02-29
album: シンクロときめき Type-B
  type: MusicAlbum
  date published: 2012-02-29
album: シンクロときめき Type-D
  type: MusicAlbum
  date published: 2012-02-29
album: シンクロときめき Type-C
  type: MusicAlbum
  date published: 2012-02-29
album: 大人ジェリービーンズ Type-B
  type: MusicAlbum
  date published: 2012-07-25
album: 大人ジェリービーンズ Type-B
  type: MusicAlbum
  date published: 2012-07-25
album: 大人ジェリービーンズ Type-A
  type: MusicAlbum
  date published: 2012-07-25
album: 大人ジェリービーンズ Type-C
  type: MusicAlbum
  date published: 2012-07-25
album: 大人ジェリービーンズ Type-A
  type: MusicAlbum
  date published: 2012-07-25
album: 大人ジェリービーンズ Type-C
  type: MusicAlbum
  date published: 2012-07-25
album: 大人ジェリービーンズ Type-D
  type: MusicAlbum
  date published: 2012-07-25
album: 大人ジェリービーンズ Type-D
  type: MusicAlbum
  date published: 2012-07-25
album: ヒカルものたち Type-A
  type: MusicAlbum
  date published: 2012-11-21
  track: ヒカルものたち
    type: MusicRecording
    duration: PT4M22S
    duration ms: 262773
    explicit: false
    by artist: Mayu Watanabe
    in album: ヒカルものたち Type-A
      type: MusicAlbum
      date published: 2012-11-21
    genre: c-pop
    genre: j-pop
    isrc code: JPSR01203461
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3f7f1ff98313ad62658a38766fde4d0562b816f8073e6d21d0df66fe40253ea5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959118
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959118
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01203461
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T10:01:58Z
    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 0x3f7f1ff98313ad62658a38766fde4d0562b816f8073e6d21d0df66fe40253ea5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPSR01203461.
      date published: 2026-07-22T10:01:58Z
    audio: ヒカルものたち
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.99
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.593
      additional property: Energy
        type: PropertyValue
        value: 0.976
      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0.171
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.437
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.762
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.497
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: ヒカルものたち Type-D
  type: MusicAlbum
  date published: 2012-11-21
album: ヒカルものたち Type-C
  type: MusicAlbum
  date published: 2012-11-21
album: ヒカルものたち Type-A
  type: MusicAlbum
  date published: 2012-11-21
album: ヒカルものたち Type-D
  type: MusicAlbum
  date published: 2012-11-21
album: ヒカルものたち Type-B
  type: MusicAlbum
  date published: 2012-11-21
album: ヒカルものたち Type-B
  type: MusicAlbum
  date published: 2012-11-21
album: ラッパ練習中 Type-C
  type: MusicAlbum
  date published: 2013-07-10
album: ラッパ練習中 Type-A
  type: MusicAlbum
  date published: 2013-07-10
album: ラッパ練習中 Type-D
  type: MusicAlbum
  date published: 2013-07-10
album: ラッパ練習中 Type-B
  type: MusicAlbum
  date published: 2013-07-10
album: 出逢いの続き Type-A
album: 出逢いの続き Type-C
album: 出逢いの続き Type-B
album: 出逢いの続き Type-C（通常盤）
album: 正しい魔法の使い方（映画魔法つかいプリキュア！奇跡の変身！キュアモフルン！ver.）
album: Best Regards!
track: トライアングラー

ラッパ練習中 Type-B
type: MusicAlbum
date published: 2013-07-10

ラッパ練習中 Type-A
type: MusicAlbum
date published: 2013-07-10

ラッパ練習中 Type-C
type: MusicAlbum
date published: 2013-07-10

ラッパ練習中 Type-D
type: MusicAlbum
date published: 2013-07-10

出逢いの続き Type-A
type: MusicAlbum
date published: 2015-06-10

出逢いの続き Type-C
type: MusicAlbum
date published: 2015-06-10

出逢いの続き Type-B
type: MusicAlbum
date published: 2015-06-10

出逢いの続き Type-C（通常盤）
type: MusicAlbum
date published: 2015-06-10

出逢いの続き Type-A
type: MusicAlbum
date published: 2015-06-10

正しい魔法の使い方（映画魔法つかいプリキュア！奇跡の変身！キュアモフルン！ver.）
type: MusicAlbum
date published: 2016-10-12

正しい魔法の使い方（映画魔法つかいプリキュア！奇跡の変身！キュアモフルン！ver.）
type: MusicAlbum
date published: 2016-10-12

Best Regards!
type: MusicAlbum
date published: 2017-12-20
track: シンクロときめき
  type: MusicRecording
  duration: PT3M52S
  duration ms: 232800
  explicit: false
  by artist: Mayu Watanabe
  in album: Best Regards!
    type: MusicAlbum
    date published: 2017-12-20
  genre: c-pop
  genre: j-pop
  isrc code: JPSR01200021
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc966a842e6556def028b5162172fa3a3082795dcb69634f50235ac1d35eaec9c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958373
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958373
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01200021
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T06:09:33Z
  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 0xc966a842e6556def028b5162172fa3a3082795dcb69634f50235ac1d35eaec9c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPSR01200021.
    date published: 2026-07-17T06:09:33Z
  audio: シンクロときめき
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 160.032
    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: 0.584
    additional property: Energy
      type: PropertyValue
      value: 0.932
    additional property: Speechiness
      type: PropertyValue
      value: 0.052
    additional property: Acousticness
      type: PropertyValue
      value: 0.026
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.346
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.66
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.473
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: 大人ジェリービーンズ
  type: MusicRecording
  duration: PT3M35S
  duration ms: 215786
  explicit: false
  by artist: Mayu Watanabe
  in album: Best Regards!
    type: MusicAlbum
    date published: 2017-12-20
  genre: c-pop
  genre: j-pop
  isrc code: JPSR01202201
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T11:29:40+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfbef0c5fa8fe6260613399268f05d287f52b6158a5f631e073f7ac379c873d8e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956738
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956738
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01202201
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T04:47:21Z
  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 0xfbef0c5fa8fe6260613399268f05d287f52b6158a5f631e073f7ac379c873d8e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPSR01202201.
    date published: 2026-07-05T04:47:21Z
  audio: 大人ジェリービーンズ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 157.024
    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: 0.555
    additional property: Energy
      type: PropertyValue
      value: 0.989
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.029
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.316
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.965
    additional property: Loudness (dB)
      type: PropertyValue
      value: -2.582
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: ヒカルものたち
  type: MusicRecording
  duration: PT4M21S
  duration ms: 261746
  explicit: false
  by artist: Mayu Watanabe
  in album: Best Regards!
    type: MusicAlbum
    date published: 2017-12-20
  genre: c-pop
  genre: j-pop
  isrc code: JPSR01203461
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3f7f1ff98313ad62658a38766fde4d0562b816f8073e6d21d0df66fe40253ea5
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959137
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959137
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: ヒカルものたち
track: ラッパ練習中
track: 出逢いの続き

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01203461

OTSTimestamp
type: PropertyValue
value: 2026-07-22T14:03:35Z

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 0x3f7f1ff98313ad62658a38766fde4d0562b816f8073e6d21d0df66fe40253ea5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPSR01203461.
date published: 2026-07-22T14:03:35Z

ヒカルものたち
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 130.997
additional property: Musical Key
  type: PropertyValue
  value: 7
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.594
additional property: Energy
  type: PropertyValue
  value: 0.982
additional property: Speechiness
  type: PropertyValue
  value: 0.044
additional property: Acousticness
  type: PropertyValue
  value: 0.116
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.423
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.716
additional property: Loudness (dB)
  type: PropertyValue
  value: -3.129
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major

ラッパ練習中
type: MusicRecording
duration: PT4M17S
duration ms: 257040
explicit: false
by artist: Mayu Watanabe
in album: Best Regards!
  type: MusicAlbum
  date published: 2017-12-20
genre: c-pop
genre: j-pop
isrc code: JPSR01300941
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5458182816a9f2d3b6ff4faf6b2844b9b6cafeb119ca1c66fc93f16b012e4268
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959094
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959094
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01300941
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-22T03:33:16Z
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 0x5458182816a9f2d3b6ff4faf6b2844b9b6cafeb119ca1c66fc93f16b012e4268. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPSR01300941.
  date published: 2026-07-22T03:33:16Z
audio: ラッパ練習中
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 137.98
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.674
  additional property: Energy
    type: PropertyValue
    value: 0.894
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.174
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.341
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.941
  additional property: Loudness (dB)
    type: PropertyValue
    value: -3.134
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

出逢いの続き
type: MusicRecording
duration: PT3M55S
duration ms: 235733
explicit: false
by artist: Mayu Watanabe
in album: Best Regards!
  type: MusicAlbum
  date published: 2017-12-20
genre: c-pop
genre: j-pop
isrc code: JPU901501548
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-12T22:01:31+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x28729f52579b369789a643789b956f4041c1b5243040b71ca761d655968edfae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957766
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957766
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901501548
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-12T22:25:04Z
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 0x28729f52579b369789a643789b956f4041c1b5243040b71ca761d655968edfae. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/JPU901501548.
  date published: 2026-07-12T22:25:04Z
audio: 出逢いの続き
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.995
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.615
  additional property: Energy
    type: PropertyValue
    value: 0.822
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.61
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.134
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.633
  additional property: Loudness (dB)
    type: PropertyValue
    value: -3.039
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Best Regards!
type: MusicAlbum
date published: 2017-12-20

Best Regards!
type: MusicAlbum
date published: 2017-12-20
track: シンクロときめき
  type: MusicRecording
  duration: PT3M52S
  duration ms: 232800
  explicit: false
  by artist: Mayu Watanabe
  in album: Best Regards!
    type: MusicAlbum
    date published: 2017-12-20
  genre: c-pop
  genre: j-pop
  isrc code: JPSR01200021
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T20:55:23+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc966a842e6556def028b5162172fa3a3082795dcb69634f50235ac1d35eaec9c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957754
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957754
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01200021
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T21:26:22Z
  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 0xc966a842e6556def028b5162172fa3a3082795dcb69634f50235ac1d35eaec9c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPSR01200021.
    date published: 2026-07-12T21:26:22Z
  audio: シンクロときめき
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 160.035
    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: 0.584
    additional property: Energy
      type: PropertyValue
      value: 0.932
    additional property: Speechiness
      type: PropertyValue
      value: 0.052
    additional property: Acousticness
      type: PropertyValue
      value: 0.026
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.346
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.661
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.473
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: 大人ジェリービーンズ
  type: MusicRecording
  duration: PT3M35S
  duration ms: 215786
  explicit: false
  by artist: Mayu Watanabe
  in album: Best Regards!
    type: MusicAlbum
    date published: 2017-12-20
  genre: c-pop
  genre: j-pop
  isrc code: JPSR01202201
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T11:29:40+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfbef0c5fa8fe6260613399268f05d287f52b6158a5f631e073f7ac379c873d8e
  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/JPSR01202201
  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 0xfbef0c5fa8fe6260613399268f05d287f52b6158a5f631e073f7ac379c873d8e. 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/JPSR01202201.
    date published: 2026-07-03T19:59:51Z
  audio: 大人ジェリービーンズ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 157.025
    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: 0.555
    additional property: Energy
      type: PropertyValue
      value: 0.989
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.029
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.316
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.965
    additional property: Loudness (dB)
      type: PropertyValue
      value: -2.582
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: ヒカルものたち
  type: MusicRecording
  duration: PT4M21S
  duration ms: 261746
  explicit: false
  by artist: Mayu Watanabe
  in album: Best Regards!
    type: MusicAlbum
    date published: 2017-12-20
  genre: c-pop
  genre: j-pop
  isrc code: JPSR01203461
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T00:07:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3f7f1ff98313ad62658a38766fde4d0562b816f8073e6d21d0df66fe40253ea5
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959084
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: ヒカルものたち
track: ラッパ練習中
track: 出逢いの続き
track: 正しい魔法の使い方

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/959084

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01203461

OTSTimestamp
type: PropertyValue
value: 2026-07-22T00:50:00Z

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 0x3f7f1ff98313ad62658a38766fde4d0562b816f8073e6d21d0df66fe40253ea5. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPSR01203461.
date published: 2026-07-22T00:50:00Z

ヒカルものたち
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 130.989
additional property: Musical Key
  type: PropertyValue
  value: 7
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.594
additional property: Energy
  type: PropertyValue
  value: 0.982
additional property: Speechiness
  type: PropertyValue
  value: 0.044
additional property: Acousticness
  type: PropertyValue
  value: 0.116
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.423
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.717
additional property: Loudness (dB)
  type: PropertyValue
  value: -3.129
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major

ラッパ練習中
type: MusicRecording
duration: PT4M17S
duration ms: 257040
explicit: false
by artist: Mayu Watanabe
in album: Best Regards!
  type: MusicAlbum
  date published: 2017-12-20
genre: c-pop
genre: j-pop
isrc code: JPSR01300941
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T12:46:14+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5458182816a9f2d3b6ff4faf6b2844b9b6cafeb119ca1c66fc93f16b012e4268
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958734
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958734
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR01300941
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T12:54:58Z
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 0x5458182816a9f2d3b6ff4faf6b2844b9b6cafeb119ca1c66fc93f16b012e4268. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/JPSR01300941.
  date published: 2026-07-19T12:54:58Z
audio: ラッパ練習中
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 137.98
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.674
  additional property: Energy
    type: PropertyValue
    value: 0.894
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.173
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.341
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.942
  additional property: Loudness (dB)
    type: PropertyValue
    value: -3.134
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

出逢いの続き
type: MusicRecording
duration: PT3M55S
duration ms: 235733
explicit: false
by artist: Mayu Watanabe
in album: Best Regards!
  type: MusicAlbum
  date published: 2017-12-20
genre: c-pop
genre: j-pop
isrc code: JPU901501548
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x28729f52579b369789a643789b956f4041c1b5243040b71ca761d655968edfae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958373
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958373
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901501548
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T06:09:33Z
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 0x28729f52579b369789a643789b956f4041c1b5243040b71ca761d655968edfae. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPU901501548.
  date published: 2026-07-17T06:09:33Z
audio: 出逢いの続き
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 122.011
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.616
  additional property: Energy
    type: PropertyValue
    value: 0.822
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.61
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.134
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.633
  additional property: Loudness (dB)
    type: PropertyValue
    value: -3.04
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

正しい魔法の使い方
type: MusicRecording
duration: PT3M37S
duration ms: 217146
explicit: false
by artist: Mayu Watanabe
in album: Best Regards!
  type: MusicAlbum
  date published: 2017-12-20
genre: c-pop
genre: j-pop
isrc code: JPU901703622
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T03:32:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8e8a492d70bbb919eab8b97cbe15bcaa247362d8f891c40776d8c9616c5e3ea7
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/JPU901703622
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
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  date published: 2026-07-21T03:51:22Z
audio: 正しい魔法の使い方
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トライアングラー
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in album: 坂本真綾20周年記念トリビュートアルバム REQUEST
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  date published: 2026-07-29T19:35:34Z
audio: トライアングラー
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