Duy Khánh
type: MusicGroup
genre: bolero
genre: vietnamese bolero
description: Nguyễn Văn Diệp, stage name Duy Khánh (born 1 June 1936 in Triệu Phước Village, Triệu Phong District, Quang Tri Province, Việt Nam – died 12 February 2003, Fountain Valley, CA, USA) was a Vietnamese s
popularity: 30
followers: 45540
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1671f4b94d6abfe03a65d7124d824336f67df67144c64af003c7210a2b8a6be1
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/ad932591-d219-4524-bcfb-b2ff4679e2e2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ad932591-d219-4524-bcfb-b2ff4679e2e2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ad932591-d219-4524-bcfb-b2ff4679e2e2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1671f4b94d6abfe03a65d7124d824336f67df67144c64af003c7210a2b8a6be1","name":"Duy Khánh","registered_at":"2026-06-12T07:09:50Z","symbol":"NIM0223989","token_address":"0x2df5c4e7a68a8082deb62a3565c90b58c7f5839b","type":"artist","uuid":"ad932591-d219-4524-bcfb-b2ff4679e2e2"}
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 0x1671f4b94d6abfe03a65d7124d824336f67df67144c64af003c7210a2b8a6be1. 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/ad932591-d219-4524-bcfb-b2ff4679e2e2.json and https://artists.proofprofile.net/proofs/artist/ad932591-d219-4524-bcfb-b2ff4679e2e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x1671f4b94d6abfe03a65d7124d824336f67df67144c64af003c7210a2b8a6be1","name":"Duy Khánh","registered_at":"2026-06-12T07:09:50Z","symbol":"NIM0223989","token_address":"0x2df5c4e7a68a8082deb62a3565c90b58c7f5839b","type":"artist","uuid":"ad932591-d219-4524-bcfb-b2ff4679e2e2"}
album: Hòn Vọng Phu I,II,III (Dĩa Hát 516-2012)
  type: MusicAlbum
  date published: 1968-01-01
album: Tiếng Hát Duy Khánh 1
  type: MusicAlbum
  date published: 1973-01-01
album: Tiếng Hát Duy Khánh 2
  type: MusicAlbum
  date published: 1974-01-01
album: Duy Khánh 3
  type: MusicAlbum
  date published: 1975-01-01
album: Mưa Trên Phố Huế (Remastered)
  type: MusicAlbum
  date published: 1985-01-01
album: Tiếng Hát Duy Khánh
  type: MusicAlbum
  date published: 1987-01-01
album: Những Ngày Xưa Thân Ái
  type: MusicAlbum
  date published: 1988
  track: Những Ngày Xưa Thân Ái
    type: MusicRecording
    duration: PT4M31S
    duration ms: 271200
    explicit: false
    by artist: Duy Khánh
    in album: Những Ngày Xưa Thân Ái
      type: MusicAlbum
      date published: 1988
    genre: bolero
    genre: vietnamese bolero
    isrc code: USJ3V1106530
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T08:12:25+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa2ddc172c9d01dcdb0414cb4eb1b7cf926302b306183453bb821150f108a64c2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959114
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959114
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1106530
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T08:41:42Z
    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 0xa2ddc172c9d01dcdb0414cb4eb1b7cf926302b306183453bb821150f108a64c2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USJ3V1106530.
      date published: 2026-07-22T08:41:42Z
    audio: Những Ngày Xưa Thân Ái
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 174.815
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.398
      additional property: Energy
        type: PropertyValue
        value: 0.373
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.387
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.272
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.495
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.79
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Lá Thư Trần Thế (Remastered)
  type: MusicAlbum
  date published: 1988-01-01
album: Tac Pham Va Tieng Hat
  type: MusicAlbum
  date published: 1988-02-26
album: Nhung Ngay Xua Than Ai
  type: MusicAlbum
  date published: 1988-05-13
album: Những Ngày Xưa Thân Ái
  type: MusicAlbum
  date published: 1988-06-25
album: Cảm Ơn (Remastered)
  type: MusicAlbum
  date published: 1989-01-01
album: Lính Trận Miền Xa (Remastered)
  type: MusicAlbum
  date published: 1989-01-01
album: Thư Xuân Trên Rừng Cao (Remastered)
  type: MusicAlbum
  date published: 1989-01-01
album: Tiếng Hát Duy Khánh 2 (Hát Cho Quê Hương Việt Nam)
  type: MusicAlbum
  date published: 1989-01-01
album: Lính Xa Nhà (Remastered)
  type: MusicAlbum
  date published: 1989-01-01
album: Tiếng Hát Duy Khánh 1
  type: MusicAlbum
  date published: 1989-01-01
album: Đường Chiều (Remastered)
  type: MusicAlbum
  date published: 1989-01-01
album: Một Mai Giã Từ Vũ Khí
  type: MusicAlbum
  date published: 1989-06-25
  track: Xuân Nào Con Sẽ Về
    type: MusicRecording
    duration: PT6M13S
    duration ms: 373000
    explicit: false
    by artist: Duy Khánh
    in album: Một Mai Giã Từ Vũ Khí
      type: MusicAlbum
      date published: 1989-06-25
    genre: bolero
    genre: vietnamese bolero
    isrc code: USJ3V1107704
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T17:27:25+00:00
    additional property: CopyrightChainExplorerURL
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Xuân Nào Con Sẽ Về
  track: Ngày Đá Đơm Bông
  track: Lời Đắng Cho Cuộc Tình
  track: Lính Xa Nhà
  track: Xuân Này Con Không Về
album: Biệt Kinh Kỳ
album: Về Đâu Mái Tóc Người Thương
album: Lính Nghĩ Gì (Remastered)
album: Đập Vỡ Cây Đàn (Remastered)
album: Áo Nhà Binh (Dĩa Hát M 3687-88)
album: Lối Về Đất Mẹ (Dĩa Hát M 3459-60)
album: Hoài Non Nước (Dĩa Hát 523-2014)
album: Bông Cỏ May (Dĩa Hát M 3597-98)
album: Tình Đời (Remastered)
album: Hát Cho Mai Sau
album: Chiều Tây Đô
album: Cô Hàng Xóm
album: Tình Đời - Tình Bạn - Tình Yêu
album: Chieu Tay Do
album: Lòng Mẹ Việt Nam (Remastered)
album: Ve Dau Mai Toc Nguoi Thuong
album: Đi Tìm Bóng Mát Quê Hương
album: Tấm ảnh ngày xưa
album: Đêm Nguyện Cầu (Remastered)
album: Vỹ dạ đò trăng - Duy Khanh - Hương Lan - Thiên Trang
album: Mot Mai Gia Tu Vu Khi
album: Lẻ bóng
album: Duy Khánh - Hòn vọng phu
album: Duy Khánh Đặc Biệt (Không Biết Hôm Nay Vì Sao Tôi Buồn)
album: Gửi Người Về Cát Bụi
album: Người Bạn Tình Xưa
album: Chiều Trên Phố Bolsa
album: Từ Tiếng Hát Tiếp Nối
album: Điệu Buồn Chia Xa
album: Huế Tình Yêu Của Tôi
album: Nhung Chieu Khong Co Em
album: Linh Va Doi Linh
album: Nhung Manh Tinh Que
album: Gửi người về cát bụi
album: Năm 2000 Năm
album: Đa Tạ
album: Ca Khúc Trầm Tử Thiêng (Con Quốc Việt Nam)
album: Quê Hương Ta
album: Những Chiều Không Có Em
album: Lính Và Đời Lính
album: Bài Hương Ca Vô Tận
album: Năm 2000
album: Tình Nước

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x5d5b4463490420eb47d9ea553682ec32ac747ac7f1fe7a1e97b69375cb783a3a

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 956545

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956545

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1107704

OTSTimestamp
type: PropertyValue
value: 2026-07-03T19:59:51Z

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 0x5d5b4463490420eb47d9ea553682ec32ac747ac7f1fe7a1e97b69375cb783a3a. 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/USJ3V1107704.
date published: 2026-07-03T19:59:51Z

Xuân Nào Con Sẽ Về
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 88.157
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: 0.548
additional property: Energy
  type: PropertyValue
  value: 0.493
additional property: Speechiness
  type: PropertyValue
  value: 0.023
additional property: Acousticness
  type: PropertyValue
  value: 0.626
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.366
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.364
additional property: Loudness (dB)
  type: PropertyValue
  value: -8.061
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major

Ngày Đá Đơm Bông
type: MusicRecording
duration: PT5M6S
duration ms: 306666
explicit: false
by artist: Duy Khánh
in album: Một Mai Giã Từ Vũ Khí
  type: MusicAlbum
  date published: 1989-06-25
genre: bolero
genre: vietnamese bolero
isrc code: USJ3V1129008
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T13:41:39+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb1ef9453f2d61b045b5bf8f055386c49b2a82e517ad089f26deea3e7c4c80c20
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/USJ3V1129008
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 0xb1ef9453f2d61b045b5bf8f055386c49b2a82e517ad089f26deea3e7c4c80c20. 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/USJ3V1129008.
  date published: 2026-07-03T19:59:51Z
audio: Ngày Đá Đơm Bông
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 108.188
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.744
  additional property: Energy
    type: PropertyValue
    value: 0.529
  additional property: Speechiness
    type: PropertyValue
    value: 0.024
  additional property: Acousticness
    type: PropertyValue
    value: 0.595
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.242
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.781
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.693
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lời Đắng Cho Cuộc Tình
type: MusicRecording
duration: PT6M45S
duration ms: 405000
explicit: false
by artist: Duy Khánh
in album: Một Mai Giã Từ Vũ Khí
  type: MusicAlbum
  date published: 1989-06-25
genre: bolero
genre: vietnamese bolero
isrc code: USJ3V1129011
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T21:20:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x565ad9e255fec9570d8a9d66fd1760d10ee7844b0624951314bbc2b232a8fe2b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959061
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959061
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1129011
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T21:34:21Z
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 0x565ad9e255fec9570d8a9d66fd1760d10ee7844b0624951314bbc2b232a8fe2b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USJ3V1129011.
  date published: 2026-07-21T21:34:21Z
audio: Lời Đắng Cho Cuộc Tình
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 81.152
  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: 0.557
  additional property: Energy
    type: PropertyValue
    value: 0.421
  additional property: Speechiness
    type: PropertyValue
    value: 0.026
  additional property: Acousticness
    type: PropertyValue
    value: 0.641
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.092
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.216
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.476
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Lính Xa Nhà
type: MusicRecording
duration: PT4M49S
duration ms: 289000
explicit: false
by artist: Duy Khánh
in album: Một Mai Giã Từ Vũ Khí
  type: MusicAlbum
  date published: 1989-06-25
genre: bolero
genre: vietnamese bolero
isrc code: USJ3V1129012
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T17:18:33+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x87b35ffb17266883559e5fcc62420cfdffebb5cd2c83dee28dedb8ad7b0362dd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958594
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958594
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1129012
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T18:05:01Z
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 0x87b35ffb17266883559e5fcc62420cfdffebb5cd2c83dee28dedb8ad7b0362dd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USJ3V1129012.
  date published: 2026-07-18T18:05:01Z
audio: Lính Xa Nhà
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 86.232
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.637
  additional property: Energy
    type: PropertyValue
    value: 0.513
  additional property: Speechiness
    type: PropertyValue
    value: 0.024
  additional property: Acousticness
    type: PropertyValue
    value: 0.78
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.391
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.598
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.926
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Xuân Này Con Không Về
type: MusicRecording
duration: PT5M17S
duration ms: 317106
explicit: false
by artist: Duy Khánh
in album: Một Mai Giã Từ Vũ Khí
  type: MusicAlbum
  date published: 1989-06-25
genre: bolero
genre: vietnamese bolero
isrc code: USJ3V1129014
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcb948cb82c3079634d5f4f480e6110ab0e336b67b8587a8f0d41d3af7732bd56
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958202
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958202
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1129014
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T21:23:21Z
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 0xcb948cb82c3079634d5f4f480e6110ab0e336b67b8587a8f0d41d3af7732bd56. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USJ3V1129014.
  date published: 2026-07-15T21:23:21Z
audio: Xuân Này Con Không Về
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 129.921
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.516
  additional property: Energy
    type: PropertyValue
    value: 0.49
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.607
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.08
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.246
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.697
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Biệt Kinh Kỳ
type: MusicAlbum
date published: 1989-06-25
track: Biệt Kinh Kỳ
  type: MusicRecording
  duration: PT4M27S
  duration ms: 267000
  explicit: false
  by artist: Duy Khánh
  in album: Biệt Kinh Kỳ
    type: MusicAlbum
    date published: 1989-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1105423
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T16:46:39+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x362b727f93ce3bf0750b950f0217b5b10179b4e63e0c0e6693ad7c7fa625d8cc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956826
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956826
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1105423
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T19:27:56Z
  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 0x362b727f93ce3bf0750b950f0217b5b10179b4e63e0c0e6693ad7c7fa625d8cc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USJ3V1105423.
    date published: 2026-07-05T19:27:56Z
  audio: Biệt Kinh Kỳ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 95.919
    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: 0.527
    additional property: Energy
      type: PropertyValue
      value: 0.4
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.658
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.278
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.559
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.003
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Một Mai Giã Từ Vũ Khí
type: MusicAlbum
date published: 1989-06-25
track: Xuân Này Con Không Về
  type: MusicRecording
  duration: PT5M17S
  duration ms: 317106
  explicit: false
  by artist: Duy Khánh
  in album: Một Mai Giã Từ Vũ Khí
    type: MusicAlbum
    date published: 1989-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1129014
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T11:17:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xcb948cb82c3079634d5f4f480e6110ab0e336b67b8587a8f0d41d3af7732bd56
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958152
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958152
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1129014
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T12:00:27Z
  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 0xcb948cb82c3079634d5f4f480e6110ab0e336b67b8587a8f0d41d3af7732bd56. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USJ3V1129014.
    date published: 2026-07-15T12:00:27Z
  audio: Xuân Này Con Không Về
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 129.921
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.516
    additional property: Energy
      type: PropertyValue
      value: 0.49
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.607
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.08
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.246
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.697
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Về Đâu Mái Tóc Người Thương
type: MusicAlbum
date published: 1989-06-25
track: Về Đâu Mái Tóc Người Thương
  type: MusicRecording
  duration: PT4M24S
  duration ms: 264493
  explicit: false
  by artist: Duy Khánh
  in album: Về Đâu Mái Tóc Người Thương
    type: MusicAlbum
    date published: 1989-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1106654
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T20:41:18+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6b8184e429b28db883219e96a7c2411aa1e663a49e6c07adbd152c58e1cb2ca7
  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/USJ3V1106654
  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 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 0x6b8184e429b28db883219e96a7c2411aa1e663a49e6c07adbd152c58e1cb2ca7. 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/USJ3V1106654.
    date published: 2026-07-05T01:12:41Z
  audio: Về Đâu Mái Tóc Người Thương
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 147.495
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.432
    additional property: Energy
      type: PropertyValue
      value: 0.478
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.721
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.325
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.283
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.324
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Quê Hương Bỏ Lại
  type: MusicRecording
  duration: PT5M47S
  duration ms: 347826
  explicit: false
  by artist: Duy Khánh
  in album: Về Đâu Mái Tóc Người Thương
    type: MusicAlbum
    date published: 1989-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1106661
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T14:37:23+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4a100ac74c29ba4c48634735e184284a134c4567bb0c44adc318dcce485a3582
  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/USJ3V1106661
  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 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 0x4a100ac74c29ba4c48634735e184284a134c4567bb0c44adc318dcce485a3582. 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/USJ3V1106661.
    date published: 2026-07-05T01:12:41Z
  audio: Quê Hương Bỏ Lại
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 82.066
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.651
    additional property: Energy
      type: PropertyValue
      value: 0.522
    additional property: Speechiness
      type: PropertyValue
      value: 0.025
    additional property: Acousticness
      type: PropertyValue
      value: 0.749
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.067
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.375
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.892
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Trong Tầm Mắt Đời
  type: MusicRecording
  duration: PT4M59S
  duration ms: 299866
  explicit: false
  by artist: Duy Khánh
  in album: Về Đâu Mái Tóc Người Thương
    type: MusicAlbum
    date published: 1989-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1106662
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T03:07:56+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb68ade52e423800bc83e8ea6ee2d4ec629a1d97c6a768287a4c01fac7e814164
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958959
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Trong Tầm Mắt Đời

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958959

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1106662

OTSTimestamp
type: PropertyValue
value: 2026-07-21T03:51:22Z

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 0xb68ade52e423800bc83e8ea6ee2d4ec629a1d97c6a768287a4c01fac7e814164. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1106662.
date published: 2026-07-21T03:51:22Z

Trong Tầm Mắt Đời
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 143.993
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: 0.598
additional property: Energy
  type: PropertyValue
  value: 0.461
additional property: Speechiness
  type: PropertyValue
  value: 0.026
additional property: Acousticness
  type: PropertyValue
  value: 0.625
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.055
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.524
additional property: Loudness (dB)
  type: PropertyValue
  value: -8.52
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major

Lính Nghĩ Gì (Remastered)
type: MusicAlbum
date published: 1990
track: Trên Bốn Vùng Chiến Thuật (1990) - Remastered
  type: MusicRecording
  duration: PT4M19S
  duration ms: 259392
  explicit: false
  by artist: Duy Khánh
  in album: Lính Nghĩ Gì (Remastered)
    type: MusicAlbum
    date published: 1990
  genre: bolero
  genre: vietnamese bolero
  isrc code: QM9SX2400361
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T06:00:21+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x679e4e3fe033ac388c718f874c6a1bfc8bf6b5ed3d2e3477dbe8605c16e5cc8e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958680
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958680
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM9SX2400361
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T06:04:14Z
  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 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 0x679e4e3fe033ac388c718f874c6a1bfc8bf6b5ed3d2e3477dbe8605c16e5cc8e. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QM9SX2400361.
    date published: 2026-07-19T06:04:14Z
  audio: Trên Bốn Vùng Chiến Thuật (1990) - Remastered
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 169.878
    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: 0.387
    additional property: Energy
      type: PropertyValue
      value: 0.413
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.26
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.232
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.619
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.838
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Chiều Thương Đô Thị (1991) - Remastered
  type: MusicRecording
  duration: PT4M47S
  duration ms: 287787
  explicit: false
  by artist: Duy Khánh
  in album: Lính Nghĩ Gì (Remastered)
    type: MusicAlbum
    date published: 1990
  genre: bolero
  genre: vietnamese bolero
  isrc code: QM9SX2400366
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T04:49:54+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb96b59ca8130c2ad072ce68edacafcea2cd526abfcb8f66f7c6928899648edfc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958969
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958969
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM9SX2400366
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T04:58:13Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96b59ca8130c2ad072ce68edacafcea2cd526abfcb8f66f7c6928899648edfc. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM9SX2400366.
    date published: 2026-07-21T04:58:13Z
  audio: Chiều Thương Đô Thị (1991) - Remastered
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 83.973
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.582
    additional property: Energy
      type: PropertyValue
      value: 0.43
    additional property: Speechiness
      type: PropertyValue
      value: 0.024
    additional property: Acousticness
      type: PropertyValue
      value: 0.789
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.182
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.419
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.377
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Tôi Chưa Có Mùa Xuân (1992) - Remastered
  type: MusicRecording
  duration: PT5M26S
  duration ms: 326726
  explicit: false
  by artist: Duy Khánh
  in album: Lính Nghĩ Gì (Remastered)
    type: MusicAlbum
    date published: 1990
  genre: bolero
  genre: vietnamese bolero
  isrc code: QM9SX2400371
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T16:45:12+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa4b0227c45be74b2135916c4ddbca1645d12f6fb1bcda655666524e50cdf9fb9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956725
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Tôi Chưa Có Mùa Xuân (1992) - Remastered

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956725

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM9SX2400371

OTSTimestamp
type: PropertyValue
value: 2026-07-05T01:12:41Z

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 0xa4b0227c45be74b2135916c4ddbca1645d12f6fb1bcda655666524e50cdf9fb9. 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/QM9SX2400371.
date published: 2026-07-05T01:12:41Z

Tôi Chưa Có Mùa Xuân (1992) - Remastered
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 85.037
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: 0.505
additional property: Energy
  type: PropertyValue
  value: 0.453
additional property: Speechiness
  type: PropertyValue
  value: 0.026
additional property: Acousticness
  type: PropertyValue
  value: 0.653
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.077
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.39
additional property: Loudness (dB)
  type: PropertyValue
  value: -7.446
additional property: Key Name
  type: PropertyValue
  value: Bb
additional property: Mode Name
  type: PropertyValue
  value: Major

Đập Vỡ Cây Đàn (Remastered)
type: MusicAlbum
date published: 1990-01-01

Áo Nhà Binh (Dĩa Hát M 3687-88)
type: MusicAlbum
date published: 1990-01-01

Lối Về Đất Mẹ (Dĩa Hát M 3459-60)
type: MusicAlbum
date published: 1990-01-01

Hoài Non Nước (Dĩa Hát 523-2014)
type: MusicAlbum
date published: 1990-01-01

Bông Cỏ May (Dĩa Hát M 3597-98)
type: MusicAlbum
date published: 1990-01-01

Tình Đời (Remastered)
type: MusicAlbum
date published: 1990-01-01

Hát Cho Mai Sau
type: MusicAlbum
date published: 1990-06-25

Chiều Tây Đô
type: MusicAlbum
date published: 1990-06-25
track: Chiều Tây Đô
  type: MusicRecording
  duration: PT5M37S
  duration ms: 337733
  explicit: false
  by artist: Duy Khánh
  in album: Chiều Tây Đô
    type: MusicAlbum
    date published: 1990-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1106163
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T01:35:08+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc4e42a9ef5c42ae46937c38f19e9551498d9acace96d23ddfe5b8868bf9b99f4
  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/USJ3V1106163
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T02:22:58Z
  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 0xc4e42a9ef5c42ae46937c38f19e9551498d9acace96d23ddfe5b8868bf9b99f4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USJ3V1106163.
    date published: 2026-07-20T02:22:58Z
  audio: Chiều Tây Đô
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 80.405
    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: 0.537
    additional property: Energy
      type: PropertyValue
      value: 0.438
    additional property: Speechiness
      type: PropertyValue
      value: 0.099
    additional property: Acousticness
      type: PropertyValue
      value: 0.5
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.08
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.453
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.418
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Major

Cô Hàng Xóm
type: MusicAlbum
date published: 1990-06-25

Chiều Tây Đô
type: MusicAlbum
date published: 1990-06-25

Tình Đời - Tình Bạn - Tình Yêu
type: MusicAlbum
date published: 1990-06-25

Chieu Tay Do
type: MusicAlbum
date published: 1990-08-06

Lòng Mẹ Việt Nam (Remastered)
type: MusicAlbum
date published: 1991-01-01

Ve Dau Mai Toc Nguoi Thuong
type: MusicAlbum
date published: 1991-05-12

Về Đâu Mái Tóc Người Thương
type: MusicAlbum
date published: 1991-06-25

Đi Tìm Bóng Mát Quê Hương
type: MusicAlbum
date published: 1992-01-01

Tấm ảnh ngày xưa
type: MusicAlbum
date published: 1992-01-01
track: Bao giờ em quên
  type: MusicRecording
  duration: PT4M31S
  duration ms: 271106
  explicit: false
  by artist: Duy Khánh
  in album: Tấm ảnh ngày xưa
    type: MusicAlbum
    date published: 1992-01-01
  genre: bolero
  genre: vietnamese bolero
  isrc code: VNA0F1780562
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T03:47:13+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc2450e3888a6a626de0bd332acc5c209904df331690f22608fcc977ba22a28ec
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956772
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956772
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F1780562
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T10:01:46Z
  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 0xc2450e3888a6a626de0bd332acc5c209904df331690f22608fcc977ba22a28ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA0F1780562.
    date published: 2026-07-05T10:01:46Z
  audio: Bao giờ em quên
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 78.124
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.454
    additional property: Energy
      type: PropertyValue
      value: 0.431
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.842
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.066
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.259
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.011
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Đêm Nguyện Cầu (Remastered)
type: MusicAlbum
date published: 1992-01-01

Vỹ dạ đò trăng - Duy Khanh - Hương Lan - Thiên Trang
type: MusicAlbum
date published: 1992-04-01
track: Huế mù sương
  type: MusicRecording
  duration: PT4M49S
  duration ms: 289640
  explicit: false
  by artist: Duy Khánh
  in album: Vỹ dạ đò trăng - Duy Khanh - Hương Lan - Thiên Trang
    type: MusicAlbum
    date published: 1992-04-01
  genre: bolero
  genre: vietnamese bolero
  isrc code: VNA0F1708344
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T03:34:31+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x1c1f9e18670a08804dc71acce9acf83e86294ac2d76687a7f5b91c8ed56ada41
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956772
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956772
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F1708344
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T10:01:46Z
  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 0x1c1f9e18670a08804dc71acce9acf83e86294ac2d76687a7f5b91c8ed56ada41. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA0F1708344.
    date published: 2026-07-05T10:01:46Z
  audio: Huế mù sương
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 79.934
    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: 0.503
    additional property: Energy
      type: PropertyValue
      value: 0.512
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.733
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.33
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.206
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.651
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major

Mot Mai Gia Tu Vu Khi
type: MusicAlbum
date published: 1992-06-16

Lẻ bóng
type: MusicAlbum
date published: 1993-01-01

Duy Khánh - Hòn vọng phu
type: MusicAlbum
date published: 1993-01-01

Duy Khánh Đặc Biệt (Không Biết Hôm Nay Vì Sao Tôi Buồn)
type: MusicAlbum
date published: 1994-01-01
track: Nỗi Buồn Gác Trọ
  type: MusicRecording
  duration: PT4M14S
  duration ms: 254973
  explicit: false
  by artist: Duy Khánh
  in album: Duy Khánh Đặc Biệt (Không Biết Hôm Nay Vì Sao Tôi Buồn)
    type: MusicAlbum
    date published: 1994-01-01
  genre: bolero
  genre: vietnamese bolero
  isrc code: VNA0F2019332
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T00:28:48+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x949c409427dfbbf2ebae9b903081ddf33326336b01d28c5cd9aebfabe72d9445
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956856
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956856
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F2019332
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:25:57Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x949c409427dfbbf2ebae9b903081ddf33326336b01d28c5cd9aebfabe72d9445. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F2019332.
    date published: 2026-07-06T01:25:57Z
  audio: Nỗi Buồn Gác Trọ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 149.708
    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: 0.344
    additional property: Energy
      type: PropertyValue
      value: 0.632
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.329
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.383
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.506
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.805
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Gửi Người Về Cát Bụi
type: MusicAlbum
date published: 1994-01-01

Người Bạn Tình Xưa
type: MusicAlbum
date published: 1994-01-01

Chiều Trên Phố Bolsa
type: MusicAlbum
date published: 1994-01-01

Từ Tiếng Hát Tiếp Nối
type: MusicAlbum
date published: 1994-01-01

Điệu Buồn Chia Xa
type: MusicAlbum
date published: 1997-01-01

Huế Tình Yêu Của Tôi
type: MusicAlbum
date published: 1997-01-01

Nhung Chieu Khong Co Em
type: MusicAlbum
date published: 1998
track: Lay Me Con Di
  type: MusicRecording
  duration: PT5M17S
  duration ms: 317048
  explicit: false
  by artist: Duy Khánh
  in album: Nhung Chieu Khong Co Em
    type: MusicAlbum
    date published: 1998
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1198369
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T06:11:28+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd49692fb5997157ea7487fdf800536b40e08aef44ee41e732ec7b84865677f5c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958690
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958690
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1198369
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T07:14:39Z
  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 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 0xd49692fb5997157ea7487fdf800536b40e08aef44ee41e732ec7b84865677f5c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USJ3V1198369.
    date published: 2026-07-19T07:14:39Z
  audio: Lay Me Con Di
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 91.191
    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.555
    additional property: Energy
      type: PropertyValue
      value: 0.241
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.702
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.343
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.324
    additional property: Loudness (dB)
      type: PropertyValue
      value: -17.21
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Linh Hon Tuong Da
  type: MusicRecording
  duration: PT4M56S
  duration ms: 296150
  explicit: false
  by artist: Duy Khánh
  in album: Nhung Chieu Khong Co Em
    type: MusicAlbum
    date published: 1998
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1198371
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T20:37:07+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xadd1c3ce1f43c3abe5c7edbd41d7ed977ee251221fc2d81bd96fa53587efc194
  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/USJ3V1198371
  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 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 0xadd1c3ce1f43c3abe5c7edbd41d7ed977ee251221fc2d81bd96fa53587efc194. 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/USJ3V1198371.
    date published: 2026-07-05T01:12:41Z
  audio: Linh Hon Tuong Da
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 167.773
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.289
    additional property: Energy
      type: PropertyValue
      value: 0.244
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.529
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.282
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.31
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.593
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Han Do Ban
  type: MusicRecording
  duration: PT4M59S
  duration ms: 299849
  explicit: false
  by artist: Duy Khánh
  in album: Nhung Chieu Khong Co Em
    type: MusicAlbum
    date published: 1998
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1198375
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T14:20:20+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x1b090aa88fe688276d55dc0f83a72299a3907c4cddcf6421074147785af1621e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956725
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Han Do Ban

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956725

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1198375

OTSTimestamp
type: PropertyValue
value: 2026-07-05T01:12:41Z

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 0x1b090aa88fe688276d55dc0f83a72299a3907c4cddcf6421074147785af1621e. 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/USJ3V1198375.
date published: 2026-07-05T01:12:41Z

Han Do Ban
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 90.4
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: 0.595
additional property: Energy
  type: PropertyValue
  value: 0.277
additional property: Speechiness
  type: PropertyValue
  value: 0.031
additional property: Acousticness
  type: PropertyValue
  value: 0.7
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.119
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.425
additional property: Loudness (dB)
  type: PropertyValue
  value: -16.263
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major

Linh Va Doi Linh
type: MusicAlbum
date published: 1998
track: Suong Trang Mien Que Ngoai
  type: MusicRecording
  duration: PT5M8S
  duration ms: 308449
  explicit: false
  by artist: Duy Khánh
  in album: Linh Va Doi Linh
    type: MusicAlbum
    date published: 1998
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1198321
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T01:39:35+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x33a2c591801e4a1cd5f4ee26976757e33fcdd971ef617d380e1cd2dc108ded0d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958951
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958951
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1198321
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T02:01:41Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a2c591801e4a1cd5f4ee26976757e33fcdd971ef617d380e1cd2dc108ded0d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USJ3V1198321.
    date published: 2026-07-21T02:01:41Z
  audio: Suong Trang Mien Que Ngoai
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 169.578
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.365
    additional property: Energy
      type: PropertyValue
      value: 0.226
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.438
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.081
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.353
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.747
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: De Tra Loi Mot Cau Hoi
  type: MusicRecording
  duration: PT4M50S
  duration ms: 290289
  explicit: false
  by artist: Duy Khánh
  in album: Linh Va Doi Linh
    type: MusicAlbum
    date published: 1998
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1198323
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T16:42:16+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x359e942f07922b675cac4a712f11a6689f36bbd632942bb12187cdefd30d46b8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958444
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958444
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1198323
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T19:12:23Z
  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 0x359e942f07922b675cac4a712f11a6689f36bbd632942bb12187cdefd30d46b8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USJ3V1198323.
    date published: 2026-07-17T19:12:23Z
  audio: De Tra Loi Mot Cau Hoi
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 94.792
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.552
    additional property: Energy
      type: PropertyValue
      value: 0.197
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.62
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.079
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.446
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.979
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Nhung Manh Tinh Que
type: MusicAlbum
date published: 1998

Gửi người về cát bụi
type: MusicAlbum
date published: 1998-01-01

Năm 2000 Năm
type: MusicAlbum
date published: 1998-01-01

Đa Tạ
type: MusicAlbum
date published: 1998-01-01

Ca Khúc Trầm Tử Thiêng (Con Quốc Việt Nam)
type: MusicAlbum
date published: 1998-01-01

Người Bạn Tình Xưa
type: MusicAlbum
date published: 1998-01-01

Huế Tình Yêu Của Tôi
type: MusicAlbum
date published: 1998-01-01

Quê Hương Ta
type: MusicAlbum
date published: 1998-06-25

Những Chiều Không Có Em
type: MusicAlbum
date published: 1998-06-25

Những Chiều Không Có Em
type: MusicAlbum
date published: 1998-06-25

Lính Và Đời Lính
type: MusicAlbum
date published: 1998-06-25

Bài Hương Ca Vô Tận
type: MusicAlbum
date published: 1998-11-20

Năm 2000
type: MusicAlbum
date published: 1999-01-01

Tình Nước
type: MusicAlbum
date published: 1999-01-31

Mưa Trên Phố Huế
type: MusicAlbum
date published: 1999-06-25
track: Mưa Trên Phố Huế
  type: MusicRecording
  duration: PT6M36S
  duration ms: 396960
  explicit: false
  by artist: Duy Khánh
  in album: Mưa Trên Phố Huế
    type: MusicAlbum
    date published: 1999-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1106170
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T02:06:06+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc65403b5c265bfcecc853e1dd194a0bbb4d546cafa97364e7e2b5817fc93d927
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958955
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958955
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1106170
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T03:03:40Z
  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 0xc65403b5c265bfcecc853e1dd194a0bbb4d546cafa97364e7e2b5817fc93d927. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USJ3V1106170.
    date published: 2026-07-21T03:03:40Z
  audio: Mưa Trên Phố Huế
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 87.882
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.554
    additional property: Energy
      type: PropertyValue
      value: 0.313
    additional property: Speechiness
      type: PropertyValue
      value: 0.025
    additional property: Acousticness
      type: PropertyValue
      value: 0.659
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.244
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.38
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.877
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Hat Cho Mai Sau
type: MusicAlbum
date published: 1999-07-10

Bao giờ em quên - Duy Khánh - Hương Lan
type: MusicAlbum
date published: 2000-01-01

Con Quốc Việt Nam
type: MusicAlbum
date published: 2000-01-01

Bao Giờ Em Quên
type: MusicAlbum
date published: 2000-03-02

Xin Anh Giữ Trọn Tình Quê
type: MusicAlbum
date published: 2001
track: Thư Về Em Gái Thành Đô
  type: MusicRecording
  duration: PT6M25S
  duration ms: 385360
  explicit: false
  by artist: Duy Khánh
  in album: Xin Anh Giữ Trọn Tình Quê
    type: MusicAlbum
    date published: 2001
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1105962
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T02:59:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x27c3e12aa1185e608ab32eeae2b0d5bfd31e74861c2274c0e4e89c6ea22dd4d9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958955
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958955
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1105962
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T03:03:40Z
  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 0x27c3e12aa1185e608ab32eeae2b0d5bfd31e74861c2274c0e4e89c6ea22dd4d9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USJ3V1105962.
    date published: 2026-07-21T03:03:40Z
  audio: Thư Về Em Gái Thành Đô
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 78.859
    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: 0.523
    additional property: Energy
      type: PropertyValue
      value: 0.562
    additional property: Speechiness
      type: PropertyValue
      value: 0.025
    additional property: Acousticness
      type: PropertyValue
      value: 0.853
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.201
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.269
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.907
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Kẻ Ở Miền Xa
  type: MusicRecording
  duration: PT3M50S
  duration ms: 230520
  explicit: false
  by artist: Duy Khánh
  in album: Xin Anh Giữ Trọn Tình Quê
    type: MusicAlbum
    date published: 2001
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1142185
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T02:09:03+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x77184ec653405e2847025074cebf2a66dd131228ba7282d9625c769f9536d476
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959089
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959089
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1142185
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T02:17:57Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x77184ec653405e2847025074cebf2a66dd131228ba7282d9625c769f9536d476. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1142185.
    date published: 2026-07-22T02:17:57Z
  audio: Kẻ Ở Miền Xa
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 83.821
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.49
    additional property: Energy
      type: PropertyValue
      value: 0.72
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.517
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.145
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.438
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.16
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Đêm Trao Kỷ Niệm
  type: MusicRecording
  duration: PT6M25S
  duration ms: 385213
  explicit: false
  by artist: Duy Khánh
  in album: Xin Anh Giữ Trọn Tình Quê
    type: MusicAlbum
    date published: 2001
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1142187
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T13:15:19+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3f0b216599613ae2eba6b006656f2faa12870778ed3a5e811a1b3240a9549814
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959011
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Đêm Trao Kỷ Niệm
track: Đêm Bơ Vơ

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/959011

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1142187

OTSTimestamp
type: PropertyValue
value: 2026-07-21T13:26:15Z

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 0x3f0b216599613ae2eba6b006656f2faa12870778ed3a5e811a1b3240a9549814. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/USJ3V1142187.
date published: 2026-07-21T13:26:15Z

Đêm Trao Kỷ Niệm
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 92.678
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: 0.547
additional property: Energy
  type: PropertyValue
  value: 0.642
additional property: Speechiness
  type: PropertyValue
  value: 0.025
additional property: Acousticness
  type: PropertyValue
  value: 0.675
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.359
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.299
additional property: Loudness (dB)
  type: PropertyValue
  value: -3.161
additional property: Key Name
  type: PropertyValue
  value: Bb
additional property: Mode Name
  type: PropertyValue
  value: Major

Đêm Bơ Vơ
type: MusicRecording
duration: PT4M40S
duration ms: 280346
explicit: false
by artist: Duy Khánh
in album: Xin Anh Giữ Trọn Tình Quê
  type: MusicAlbum
  date published: 2001
genre: bolero
genre: vietnamese bolero
isrc code: USJ3V1106884
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T02:26:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xed92195fade16a266fe73f1631a5d7c2073a9fdd3e55084d3599ba2200873a6a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956634
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956634
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1106884
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T10:04:33Z
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 0xed92195fade16a266fe73f1631a5d7c2073a9fdd3e55084d3599ba2200873a6a. 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/USJ3V1106884.
  date published: 2026-07-04T10:04:33Z
audio: Đêm Bơ Vơ
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 83.162
  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: 0.455
  additional property: Energy
    type: PropertyValue
    value: 0.745
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.525
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.169
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.449
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.642
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sao Khong Thay Anh Ve
type: MusicAlbum
date published: 2001-02-17

Nguoi Linh Gia Xa Que Huong
type: MusicAlbum
date published: 2001-04-17

Người Lính Già Xa Quê Hương
type: MusicAlbum
date published: 2001-06-25

Xin Anh Giữ Trọn Tình Quê (Vol. 1-4)
type: MusicAlbum
date published: 2001-06-25

Sao Không Thấy Anh Về
type: MusicAlbum
date published: 2001-06-25

Xin Anh Giữ Trọn Tình Quê
type: MusicAlbum
date published: 2001-06-25

Người Lính Già Xa Quê Hương (Vol. 1-4)
type: MusicAlbum
date published: 2001-06-25
track: Hẹn Một Mùa Xuân
  type: MusicRecording
  duration: PT3M18S
  duration ms: 198093
  explicit: false
  by artist: Duy Khánh
  in album: Người Lính Già Xa Quê Hương (Vol. 1-4)
    type: MusicAlbum
    date published: 2001-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1141995
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T07:35:33+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x1b1270bb29e310e2ce899d08234aff04a1a58978f7f64d1e1e04cb0defbbc8d4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958383
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958383
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1141995
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T08:20:01Z
  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 0x1b1270bb29e310e2ce899d08234aff04a1a58978f7f64d1e1e04cb0defbbc8d4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USJ3V1141995.
    date published: 2026-07-17T08:20:01Z
  audio: Hẹn Một Mùa Xuân
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 79.888
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.418
    additional property: Energy
      type: PropertyValue
      value: 0.419
    additional property: Speechiness
      type: PropertyValue
      value: 0.027
    additional property: Acousticness
      type: PropertyValue
      value: 0.593
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.221
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.497
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.179
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Lời Đầu Năm Cho Con
  type: MusicRecording
  duration: PT5M18S
  duration ms: 318226
  explicit: false
  by artist: Duy Khánh
  in album: Người Lính Già Xa Quê Hương (Vol. 1-4)
    type: MusicAlbum
    date published: 2001-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1107699
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T11:07:47+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x703ac6594183416a4e345e72d7b1a5bc84de7a817d87416200aa9fb7924b4c61
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958152
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958152
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1107699
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T12:00:27Z
  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 0x703ac6594183416a4e345e72d7b1a5bc84de7a817d87416200aa9fb7924b4c61. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USJ3V1107699.
    date published: 2026-07-15T12:00:27Z
  audio: Lời Đầu Năm Cho Con
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 129.995
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.547
    additional property: Energy
      type: PropertyValue
      value: 0.415
    additional property: Speechiness
      type: PropertyValue
      value: 0.03
    additional property: Acousticness
      type: PropertyValue
      value: 0.653
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.118
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.423
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.371
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Gió Về Miền Xuôi
  type: MusicRecording
  duration: PT4M31S
  duration ms: 271226
  explicit: false
  by artist: Duy Khánh
  in album: Người Lính Già Xa Quê Hương (Vol. 1-4)
    type: MusicAlbum
    date published: 2001-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1142022
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T20:34:11+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3c7e43f75f3618443de29a6910465c7c14e8dac1b1b7b8d99226d0175c10a100
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958931
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Gió Về Miền Xuôi

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958931

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1142022

OTSTimestamp
type: PropertyValue
value: 2026-07-20T21:15:01Z

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 0x3c7e43f75f3618443de29a6910465c7c14e8dac1b1b7b8d99226d0175c10a100. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USJ3V1142022.
date published: 2026-07-20T21:15:01Z

Gió Về Miền Xuôi
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 179.993
additional property: Musical Key
  type: PropertyValue
  value: 4
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.417
additional property: Energy
  type: PropertyValue
  value: 0.422
additional property: Speechiness
  type: PropertyValue
  value: 0.03
additional property: Acousticness
  type: PropertyValue
  value: 0.727
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.053
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.284
additional property: Loudness (dB)
  type: PropertyValue
  value: -11.021
additional property: Key Name
  type: PropertyValue
  value: E
additional property: Mode Name
  type: PropertyValue
  value: Minor

Sao Không Thấy Anh Về (Vol. 1-4)
type: MusicAlbum
date published: 2001-06-25
track: Sao Không Thấy Anh Về
  type: MusicRecording
  duration: PT4M43S
  duration ms: 283146
  explicit: false
  by artist: Duy Khánh
  in album: Sao Không Thấy Anh Về (Vol. 1-4)
    type: MusicAlbum
    date published: 2001-06-25
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1105965
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T10:20:41+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x68130a98967757e0e3489a3fc31de83890dfd091428beec72e8445c4a7cfa25f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956822
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956822
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1105965
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T18:48:28Z
  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 0x68130a98967757e0e3489a3fc31de83890dfd091428beec72e8445c4a7cfa25f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V1105965.
    date published: 2026-07-05T18:48:28Z
  audio: Sao Không Thấy Anh Về
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 139.207
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.441
    additional property: Energy
      type: PropertyValue
      value: 0.348
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.857
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.087
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.208
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.843
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Xin Anh Giu Chon Tinh Que
type: MusicAlbum
date published: 2001-11-10

Những Giai Điệu Tiếp Nối 1
type: MusicAlbum
date published: 2002-01-01

Ngày Hạnh Phúc
type: MusicAlbum
date published: 2020-01-01

Tiền Ơi Tiền
type: MusicAlbum
date published: 2020-01-01

LK Lối Về Đất Mẹ
type: MusicAlbum
date published: 2023-05-25

LK Duy Khánh
type: MusicAlbum
date published: 2023-05-25

Người Lính Già Xa Quê Hương
type: MusicAlbum
date published: 2023-08-12

Những Vùng Đất Mang Tên Anh
type: MusicAlbum
date published: 2023-08-14

Thư Xuân Hải Ngoại (Remastered)
type: MusicAlbum
date published: 2024-02-02
track: Thư Xuân Trên Rừng Cao - Remastered
  type: MusicRecording
  duration: PT4M55S
  duration ms: 295106
  explicit: false
  by artist: Duy Khánh
  in album: Thư Xuân Hải Ngoại (Remastered)
    type: MusicAlbum
    date published: 2024-02-02
  genre: bolero
  genre: vietnamese bolero
  isrc code: QM9SX2400321
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-11T15:49:28+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7c58fcc72baa027c31aaa20b77f95673f8013671ae079f7f0625bfb73a7b47fa
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957587
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957587
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM9SX2400321
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-11T16:48:26Z
  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 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 0x7c58fcc72baa027c31aaa20b77f95673f8013671ae079f7f0625bfb73a7b47fa. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QM9SX2400321.
    date published: 2026-07-11T16:48:26Z
  audio: Thư Xuân Trên Rừng Cao - Remastered
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 85.05
    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: 0.539
    additional property: Energy
      type: PropertyValue
      value: 0.5
    additional property: Speechiness
      type: PropertyValue
      value: 0.023
    additional property: Acousticness
      type: PropertyValue
      value: 0.69
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.273
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.288
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.995
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Bông Hồng Cài Áo (Remastered)
type: MusicAlbum
date published: 2024-07-26

Tình Nhạt Phai - Remake
type: MusicRecording
duration: PT5M19S
duration ms: 319384
explicit: false
by artist: Neko Lê
by artist: Duy Khánh
in album: Liều Thuốc Cho Trái Tim
  type: MusicAlbum
  date published: 2020-06-01
isrc code: VNA0F2000242
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-18T03:07:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x389b3775a8ea450b014e724b7d2914c062b153885afe2bc6a627c933b83a73e3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F2000242
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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 0x389b3775a8ea450b014e724b7d2914c062b153885afe2bc6a627c933b83a73e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/VNA0F2000242.
  date published: 2026-07-02T03:30:09Z
audio: Tình Nhạt Phai - Remake
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 138.384
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.749
  additional property: Energy
    type: PropertyValue
    value: 0.634
  additional property: Speechiness
    type: PropertyValue
    value: 0.057
  additional property: Acousticness
    type: PropertyValue
    value: 0.451
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.078
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.638
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.605
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Xin anh giữ trọn tình quê
type: MusicRecording
duration: PT5M26S
duration ms: 326726
explicit: false
by artist: Duy Khánh
in album: Tình Khúc Quê Hương
  type: MusicAlbum
  date published: 1996-02-20
isrc code: QZGCD1801902
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-18T04:57:37+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd8360c480b68cec6b0acbe0088f1f877034a750e7f7701bbaee8dabf68bebefb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGCD1801902
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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 0xd8360c480b68cec6b0acbe0088f1f877034a750e7f7701bbaee8dabf68bebefb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGCD1801902.
  date published: 2026-07-02T03:30:09Z
audio: Xin anh giữ trọn tình quê
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 154.584
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.374
  additional property: Energy
    type: PropertyValue
    value: 0.355
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.76
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.091
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.229
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.78
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Người lính già xa quê hương
type: MusicRecording
duration: PT6M22S
duration ms: 382093
explicit: false
by artist: Duy Khánh
in album: Chiều Trong Tù (Asia 167)
  type: MusicAlbum
  date published: 2002-01-01
isrc code: QZGCD1802761
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T04:53:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdc150f8639569255b28a5d5da2ad7941f496a9baf352db0b9acd7041fdbc469d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGCD1802761
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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 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 0xdc150f8639569255b28a5d5da2ad7941f496a9baf352db0b9acd7041fdbc469d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGCD1802761.
  date published: 2026-07-08T03:20:19Z
audio: Người lính già xa quê hương
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.104
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.367
  additional property: Energy
    type: PropertyValue
    value: 0.295
  additional property: Speechiness
    type: PropertyValue
    value: 0.028
  additional property: Acousticness
    type: PropertyValue
    value: 0.843
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.078
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.208
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.576
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Xuân này con không về
type: MusicRecording
duration: PT4M19S
duration ms: 259884
explicit: false
by artist: Duy Khánh
by artist: Đặng Thế Luân
in album: Tôi Chưa Có Mùa Xuân
  type: MusicAlbum
  date published: 2008-01-01
isrc code: QZGCD1803763
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T00:54:29+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xce540b5b283c5a756c91fa6158b15da52335e778f7bbc0aaba3cfa0c0e36ace0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGCD1803763
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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 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 0xce540b5b283c5a756c91fa6158b15da52335e778f7bbc0aaba3cfa0c0e36ace0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGCD1803763.
  date published: 2026-07-08T03:20:19Z
audio: Xuân này con không về
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 138.987
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.383
  additional property: Energy
    type: PropertyValue
    value: 0.538
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.801
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.11
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.334
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.411
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Đừng Gây Thương Nhớ
type: MusicRecording
duration: PT3M40S
duration ms: 220092
explicit: false
by artist: Gin Tuan Kiet
by artist: Puka
by artist: Duy Khánh
in album: Gala Nhạc Việt 15 - Năm Mới Bình An
  type: MusicAlbum
  date published: 2021-02-19
isrc code: VNA0M1912059
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T19:03:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xabd6a816a96fd48cb769d627745a70a22a29c1c59490f9b51460a9d603864776
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960296
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960296
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1912059
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T19:11:09Z
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 0xabd6a816a96fd48cb769d627745a70a22a29c1c59490f9b51460a9d603864776. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/VNA0M1912059.
  date published: 2026-07-30T19:11:09Z
audio: Đừng Gây Thương Nhớ
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 151.746
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.748
  additional property: Energy
    type: PropertyValue
    value: 0.473
  additional property: Speechiness
    type: PropertyValue
    value: 0.279
  additional property: Acousticness
    type: PropertyValue
    value: 0.464
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.159
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.342
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.308
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Liên Khúc: Yêu Là Cưới
type: MusicRecording
duration: PT5M27S
duration ms: 327000
explicit: false
by artist: Lâm Vỹ Dạ
by artist: Khả Như
by artist: Puka
by artist: Huỳnh Lập
by artist: Lê Dương Bảo Lâm
by artist: Duy Khánh
in album: Gala Nhạc Việt 16: Xuân Về Gieo Hy Vọng
  type: MusicAlbum
  date published: 2022-01-25
isrc code: FR10S2267469
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-23T16:47:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf51f61041e1920e878d63654ea342b8ae7858beafdf90136f451b26412578d75
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S2267469
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0xf51f61041e1920e878d63654ea342b8ae7858beafdf90136f451b26412578d75. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR10S2267469.
  date published: 2026-07-02T03:55:08Z
audio: Liên Khúc: Yêu Là Cưới
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 131.612
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.889
  additional property: Energy
    type: PropertyValue
    value: 0.657
  additional property: Speechiness
    type: PropertyValue
    value: 0.068
  additional property: Acousticness
    type: PropertyValue
    value: 0.261
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.063
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.78
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.73
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Minor