Mạnh Quỳnh
type: MusicGroup
genre: bolero
genre: vietnamese bolero
popularity: 31
followers: 47120
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf50d15934ea0042e6017be3b3603208c27c1f8d4fa41e543798344b92333989a
additional property: OTSHash
additional property: OTSBitcoinBlock
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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/b3dbd2ab-5f9d-47f5-82d8-af884ab0fc5c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b3dbd2ab-5f9d-47f5-82d8-af884ab0fc5c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b3dbd2ab-5f9d-47f5-82d8-af884ab0fc5c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50d15934ea0042e6017be3b3603208c27c1f8d4fa41e543798344b92333989a. 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/b3dbd2ab-5f9d-47f5-82d8-af884ab0fc5c.json and https://artists.proofprofile.net/proofs/artist/b3dbd2ab-5f9d-47f5-82d8-af884ab0fc5c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
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album: Hương Ngọc lan
  type: MusicAlbum
  date published: 1992-01-01
album: Hải Âu 198
  type: MusicAlbum
  date published: 1992-01-01
album: Chuyện tình ong bướm - Mạnh Quỳnh 6
  type: MusicAlbum
  date published: 1992-01-01
album: Chờ người
  type: MusicAlbum
  date published: 1992-01-01
album: Những Chuyện Tình Mưa
  type: MusicAlbum
  date published: 1996-01-01
album: Hai Đứa Giận Nhau
  type: MusicAlbum
  date published: 1996-01-01
album: Xin Tròn Tuổi Loạn
  type: MusicAlbum
  date published: 1996-01-01
album: Quê Hương Bất Tử 1
  type: MusicAlbum
  date published: 1996-01-01
album: Người Không Cô Đơn
  type: MusicAlbum
  date published: 1996-01-01
album: Hương Tình Cũ
  type: MusicAlbum
  date published: 1996-01-01
album: Thương Hoài Ngàn Năm
  type: MusicAlbum
  date published: 1996-01-01
album: Xin Trả Lại Cho Em
  type: MusicAlbum
  date published: 1996-01-01
album: Sông Quê
  type: MusicAlbum
  date published: 1997-01-01
album: Hạ Buồn
  type: MusicAlbum
  date published: 1997-01-01
album: Từ Ngày Tình Bỏ Ta Đi
  type: MusicAlbum
  date published: 1997-01-01
album: Kỷ Niệm Buồn
  type: MusicAlbum
  date published: 1997-01-01
album: Tôi Vẫn Nhớ
  type: MusicAlbum
  date published: 1997-01-01
album: Bọt Mưa
  type: MusicAlbum
  date published: 1997-01-01
album: Buồn Nào Hơn
  type: MusicAlbum
  date published: 1997-01-01
album: Thuyền Hoa
  type: MusicAlbum
  date published: 1997-01-01
album: Chuyện Một Chiếc Cầu Đã Gãy
  type: MusicAlbum
  date published: 1997-01-01
album: Tình Khúc Học Trò 2
  type: MusicAlbum
  date published: 1997-01-01
album: Mười Tình Ca Lính
  type: MusicAlbum
  date published: 1997-01-01
album: Nụ Cười Chua Cay
  type: MusicAlbum
  date published: 1997-01-01
album: Quê Hương Bất Tử 3
  type: MusicAlbum
  date published: 1997-01-01
album: Ru Em
  type: MusicAlbum
  date published: 1997-01-01
album: Nhẫn cỏ cho em - Mạnh Quỳnh
  type: MusicAlbum
  date published: 1997-02-10
album: Đoạn Cuối Tình Yêu
  type: MusicAlbum
  date published: 1997-06-25
album: Tiếng Hát Để Đời 3 - 40 Tình Khúc
  type: MusicAlbum
  date published: 1997-06-25
album: Dù Anh Nghèo
  type: MusicAlbum
  date published: 1997-06-25
album: Tiếng Hát Để Đời 9 - Thương Mãi Câu Hò
  type: MusicAlbum
  date published: 1997-06-25
album: Hát Nữa Đi Em
  type: MusicAlbum
  date published: 1997-06-25
album: Người Giàu Cũng Khóc
  type: MusicAlbum
  date published: 1997-06-25
album: Tình Đêm Phố Cũ
  type: MusicAlbum
  date published: 1997-06-25
album: Tiếng Hát Để Đời 10 - Học Trò Kỷ Niệm
  type: MusicAlbum
  date published: 1997-06-25
album: Con Trai Nghèo
  type: MusicAlbum
  date published: 1998-01-01
album: Em Là Tất Cả
  type: MusicAlbum
  date published: 1998-01-01
album: Merry Christmas - Mừng Xuân
  type: MusicAlbum
  date published: 1998-01-01
album: Mộng Ước Đôi Ta
  type: MusicAlbum
  date published: 1998-01-01
album: Nhẫn Cỏ Cho Em 2
  type: MusicAlbum
  date published: 1998-01-01
album: Những Đồi Hoa Sim
  type: MusicAlbum
  date published: 1998-01-01
album: Túy Ca
  type: MusicAlbum
  date published: 1998-01-01
album: Đam Mê
  type: MusicAlbum
  date published: 1998-01-01
album: Đừng Nói Yêu Anh
  type: MusicAlbum
  date published: 1998-01-01
album: Chuyện Trầu Cau
  type: MusicAlbum
  date published: 1999-01-01
album: Tình Say
  type: MusicAlbum
  date published: 2000-01-01
album: Trở Về Cát Bụi - Mạnh Quỳnh Đặc Biệt 5
  type: MusicAlbum
  date published: 2000-01-01
album: Nhẫn Cỏ Cho Em 3
  type: MusicAlbum
  date published: 2000-01-01
album: Người Yêu Của Lính 1
  type: MusicAlbum
  date published: 2000-01-01
album: Lý Đất Giồng
  type: MusicAlbum
  date published: 2000-01-01
album: Hạnh Phúc Quanh Đây
  type: MusicAlbum
  date published: 2000-01-01
album: Hoa Trinh Nữ
  type: MusicAlbum
  date published: 2000-01-01
album: 10 Tuyệt Tình Khúc
  type: MusicAlbum
  date published: 2000-01-01
album: Cho Tôi Được Một Lần
  type: MusicAlbum
  date published: 2000-01-01
album: Tình Anh Lính Chiến
album: Đôi Mắt Người Xưa
album: Đêm Tâm Sự
album: Mật Đắng Tình Yêu - Mạnh Quỳnh Đặc Biệt 1
album: Đêm Hoang
album: Hạnh phúc đơn sơ (Trường Vũ - Mạnh Quỳnh - Mạnh Đình)
album: Ngày Em 20 Tuổi
album: Màu Hoa Tím (Hải Âu 207)
album: Chuyện Tình Cờ

Tình Anh Lính Chiến
type: MusicAlbum
date published: 2000-01-01

Đôi Mắt Người Xưa
type: MusicAlbum
date published: 2000-01-01

Đêm Tâm Sự
type: MusicAlbum
date published: 2000-01-01

Mật Đắng Tình Yêu - Mạnh Quỳnh Đặc Biệt 1
type: MusicAlbum
date published: 2000-01-01

Đêm Hoang
type: MusicAlbum
date published: 2000-01-01

Hạnh phúc đơn sơ (Trường Vũ - Mạnh Quỳnh - Mạnh Đình)
type: MusicAlbum
date published: 2000-01-01

Ngày Em 20 Tuổi
type: MusicAlbum
date published: 2000-01-01

Màu Hoa Tím (Hải Âu 207)
type: MusicAlbum
date published: 2000-01-01

Chuyện Tình Cờ
type: MusicAlbum
date published: 2000-01-01

Chuyện Một Loài Hoa
type: MusicAlbum
date published: 2000-01-03

10 Tình Khúc Dâng Mẹ
type: MusicAlbum
date published: 2000-05-06

Căn Nhà Màu Tím
type: MusicAlbum
date published: 2000-06-25

Số Nghèo
type: MusicAlbum
date published: 2001-01-01

Số Nghèo
type: MusicAlbum
date published: 2001-01-01

Nhớ mầu hoa tím - Nhạc tình Bolero Mạnh Quỳnh & Mộng Thi
type: MusicAlbum
date published: 2001-01-01

Như Giấc Chiêm Bao - Mạnh Quỳnh Bất Hủ 2
type: MusicAlbum
date published: 2001-01-01

Tinh Music Platinum Series 07 - Xuân 2000
type: MusicAlbum
date published: 2001-02-03

Tình đời ... Kiếp cầm ca
type: MusicAlbum
date published: 2001-05-15

Mực Tím Mồng Tơi
type: MusicAlbum
date published: 2001-05-30

Tiếng Hát Để Đời 5 - Bài Thánh Ca Buồn
type: MusicAlbum
date published: 2001-06-25

Tiếng Hát Để Đời 6 - Xuân Yêu
type: MusicAlbum
date published: 2001-06-25

Tiếng Hát Để Đời 7 - Lính Ca
type: MusicAlbum
date published: 2001-06-25

Tiếng Hát Để Đời 4 - Hoa Nở Một Lần Thôi
type: MusicAlbum
date published: 2001-06-25

Tiếng Hát Để Đời 2 - 40 Tình Khúc - Hoài Linh - Châu Kỳ - Hoàng Phương - Vinh Sử
type: MusicAlbum
date published: 2001-06-25

Khổ tâm
type: MusicAlbum
date published: 2001-07-01

Vì Trong Nghịch Cảnh
type: MusicAlbum
date published: 2001-12-15

Tieng Hat de Doi 10 - Hoc Tro Ky Niem
type: MusicAlbum
date published: 2002
track: Noi Buon Hoa Phuong
  type: MusicRecording
  duration: PT5M54S
  duration ms: 354568
  explicit: false
  by artist: Mạnh Quỳnh
  in album: Tieng Hat de Doi 10 - Hoc Tro Ky Niem
    type: MusicAlbum
    date published: 2002
  genre: bolero
  genre: vietnamese bolero
  isrc code: USJ3V1425289
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T02:30:36+00:00
  additional property: CopyrightChainExplorerURL
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    value: https://explorer.copyrightchains.com/tx/0x46669e3027b2a14bace8eb13760e676d1dd5ad305d7c9ed1b70aacfeee65d0ca
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    value: 956634
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1425289
  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 0x46669e3027b2a14bace8eb13760e676d1dd5ad305d7c9ed1b70aacfeee65d0ca. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1425289 — a six-check JSON result.
    date published: 2026-07-04T10:04:33Z
  audio: Noi Buon Hoa Phuong
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    additional property: Tempo (BPM)
      type: PropertyValue
      value: 124.212
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.643
    additional property: Energy
      type: PropertyValue
      value: 0.315
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.16
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.087
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.238
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.267
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Đam mê - Tuyệt Phẩm song ca - Phi Nhung Mạnh Quỳnh
type: MusicAlbum
date published: 2002-01-03
track: Đam mê
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  duration: PT5M8S
  duration ms: 308160
  explicit: false
  by artist: Mạnh Quỳnh
  in album: Đam mê - Tuyệt Phẩm song ca - Phi Nhung Mạnh Quỳnh
    type: MusicAlbum
    date published: 2002-01-03
  genre: bolero
  genre: vietnamese bolero
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  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
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    value: 2026-07-04T13:37:14+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2623b95982e153aa70e18214f912954ea3086e93cbd63689f0f9206462bb320d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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    value: https://blockstream.info/api/block-height/956725
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F1704022
  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 0x2623b95982e153aa70e18214f912954ea3086e93cbd63689f0f9206462bb320d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F1704022 — a six-check JSON result.
    date published: 2026-07-05T01:12:41Z
  audio: Đam mê
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    additional property: Tempo (BPM)
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      value: 149.788
    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: 0.459
    additional property: Energy
      type: PropertyValue
      value: 0.555
    additional property: Speechiness
      type: PropertyValue
      value: 0.032
    additional property: Acousticness
      type: PropertyValue
      value: 0.094
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.165
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.237
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.927
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Lý đất giồng
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  duration: PT4M57S
  duration ms: 297640
  explicit: false
  by artist: Mạnh Quỳnh
  in album: Đam mê - Tuyệt Phẩm song ca - Phi Nhung Mạnh Quỳnh
    type: MusicAlbum
    date published: 2002-01-03
  genre: bolero
  genre: vietnamese bolero
  isrc code: VNA0F1704030
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T16:51:15+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfffeefe15ec99d74720d4306b4bed9616d8a7bf70f1182c585b2159c71dd4b76
  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/VNA0F1704030
  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 0xfffeefe15ec99d74720d4306b4bed9616d8a7bf70f1182c585b2159c71dd4b76. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0F1704030 — a six-check JSON result.
    date published: 2026-07-17T19:12:23Z
  audio: Lý đất giồng
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    additional property: Tempo (BPM)
      type: PropertyValue
      value: 115.014
    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
      value: 0.742
    additional property: Energy
      type: PropertyValue
      value: 0.678
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.323
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.099
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.561
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.722
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Major

Chuyến Đò Vĩ Tuyến
type: MusicAlbum
date published: 2002-03-28

Vợ Tôi
type: MusicAlbum
date published: 2003-01-01

Vợ Tôi
type: MusicAlbum
date published: 2003-01-01

Vợ Tôi
type: MusicAlbum
date published: 2003-01-01

Giận hờn - Mạnh Quỳnh - Phi Nhung
type: MusicAlbum
date published: 2003-11-25

Yêu nhau ngả nón ra ngồi
type: MusicAlbum
date published: 2004-01-01

Say
type: MusicAlbum
date published: 2005-01-01

Say
type: MusicAlbum
date published: 2005-01-01

Đón Xuân Này Nhớ Xuân Xưa
type: MusicAlbum
date published: 2007-01-01

Mùa Xuân Lá Khô
type: MusicAlbum
date published: 2007-01-01

Ngày Xuân Tái Ngộ
type: MusicAlbum
date published: 2007-01-01

Kẻ Sầu Đời
type: MusicAlbum
date published: 2007-01-01

Kẻ Sầu Đời
type: MusicAlbum
date published: 2007-01-01

Liên khúc quê hương 2
type: MusicAlbum
date published: 2007-01-10

Tình khúc mưa 2 - Mạnh Quỳnh
type: MusicAlbum
date published: 2007-01-10

LK Không Bao Giờ Quên Anh - Đừng Nói Xa Nhau
type: MusicAlbum
date published: 2008-01-01

Neu Chung Minh Cach Tro
type: MusicAlbum
date published: 2012-12-28

Muc Tim Mong Toi
type: MusicAlbum
date published: 2013-01-17

Liên Khúc Mùa Xuân Trên Cao - Mùa Xuân Đó Có Em - Cảm Ơn
type: MusicAlbum
date published: 2014-01-01

Chuyện Hẹn Hò
type: MusicAlbum
date published: 2018-01-01

Đừng Nói Xa Nhau
type: MusicAlbum
date published: 2018-03-01

Đừng Nói Xa Nhau
type: MusicAlbum
date published: 2018-09-11
track: Đừng Nói Xa Nhau
  type: MusicRecording
  duration: PT5M10S
  duration ms: 310413
  explicit: false
  by artist: Mạnh Quỳnh
  in album: Đừng Nói Xa Nhau
    type: MusicAlbum
    date published: 2018-09-11
  genre: bolero
  genre: vietnamese bolero
  isrc code: VNA0M1841679
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T06:06:24+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x053aa3980df30e8e7c091b416e3d12e46c7334e3331e26bfd5274b3b2e7b5a60
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958251
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958251
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1841679
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T06:29:25Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053aa3980df30e8e7c091b416e3d12e46c7334e3331e26bfd5274b3b2e7b5a60. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1841679 — a six-check JSON result.
    date published: 2026-07-16T06:29:25Z
  audio: Đừng Nói Xa Nhau
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 82.906
    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: 0.415
    additional property: Energy
      type: PropertyValue
      value: 0.591
    additional property: Speechiness
      type: PropertyValue
      value: 0.03
    additional property: Acousticness
      type: PropertyValue
      value: 0.095
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.199
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.398
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.877
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Chuyện Ba Mùa Mưa
type: MusicAlbum
date published: 2018-09-11

Hoa Tím Bằng Lăng
type: MusicAlbum
date published: 2018-09-11

Chuyện Ba Mùa Mưa
type: MusicAlbum
date published: 2018-09-11

Say
type: MusicAlbum
date published: 2018-09-29

So Ngheo
type: MusicAlbum
date published: 2018-09-29

Vo Toi
type: MusicAlbum
date published: 2018-10-11

Khi Mình Đã Hết Thương Nhau
type: MusicAlbum
date published: 2019-09-13

Thương Mãi Một Người
type: MusicAlbum
date published: 2019-12-13

Thương Mãi Một Người
type: MusicAlbum
date published: 2019-12-13

Dứt Tình
type: MusicAlbum
date published: 2019-12-27

Chôn Sâu Tình Cũ
type: MusicAlbum
date published: 2019-12-27

Mai Của Lòng Tôi
type: MusicAlbum
date published: 2020-03-21

Nội Tôi
type: MusicAlbum
date published: 2020-03-21

Kẻ Tình Si
type: MusicAlbum
date published: 2020-04-22

Đêm Nay Bố Không Về
type: MusicAlbum
date published: 2020-05-28

Đời Nhạc Sĩ Nghèo
type: MusicAlbum
date published: 2020-07-23

Hướng Về Miền Tây
type: MusicAlbum
date published: 2020-08-15

Cánh Thư Quê Nhà
type: MusicAlbum
date published: 2020-10-21

Cát Bụi Cuộc Đời
type: MusicAlbum
date published: 2020-11-11

Trách Ai Bây Giờ
type: MusicAlbum
date published: 2020-12-19

Hoa Đào Thương Nhớ
type: MusicAlbum
date published: 2021-02-01

Bài Tình Ca Tân Hôn
type: MusicAlbum
date published: 2021-04-24

Hoa Lòng Anh Vẫn Tím
type: MusicAlbum
date published: 2021-06-02

Đêm Cuối Cùng Bên Nhau
type: MusicAlbum
date published: 2021-09-10

Duyen Kiep
type: MusicAlbum
date published: 2021-10-11

Collection Mạnh Quỳnh
type: MusicAlbum
date published: 2021-10-18
track: Cát Bụi Cuộc Đời
  type: MusicRecording
  duration: PT5M2S
  duration ms: 302904
  explicit: false
  by artist: Mạnh Quỳnh
  in album: Collection Mạnh Quỳnh
    type: MusicAlbum
    date published: 2021-10-18
  genre: bolero
  genre: vietnamese bolero
  isrc code: QMDA62171209
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T04:18:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6e5d1cdc6b9d5551a888633bee9e0cf4efbb27c2c94f57f5a95af91f972781ae
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958662
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958662
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62171209
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T04:43:15Z
  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 0x6e5d1cdc6b9d5551a888633bee9e0cf4efbb27c2c94f57f5a95af91f972781ae. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62171209 — a six-check JSON result.
    date published: 2026-07-19T04:43:15Z
  audio: Cát Bụi Cuộc Đời
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 154.969
    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: 0.363
    additional property: Energy
      type: PropertyValue
      value: 0.54
    additional property: Speechiness
      type: PropertyValue
      value: 0.065
    additional property: Acousticness
      type: PropertyValue
      value: 0.537
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.11
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.34
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.065
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Thương Mãi Một Người
  type: MusicRecording
  duration: PT4M57S
  duration ms: 297540
  explicit: false
  by artist: Mạnh Quỳnh
  in album: Collection Mạnh Quỳnh
    type: MusicAlbum
    date published: 2021-10-18
  genre: bolero
  genre: vietnamese bolero
  isrc code: QMDA62171221
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T02:28:43+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x718dd5f5dc3037104159276a89ccc32a4f5b1931950b4a74c9df348d7f379b49
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956656
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956656
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62171221
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T14:03:39Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x718dd5f5dc3037104159276a89ccc32a4f5b1931950b4a74c9df348d7f379b49. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62171221 — a six-check JSON result.
    date published: 2026-07-04T14:03:39Z
  audio: Thương Mãi Một Người
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 75.955
    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
      type: PropertyValue
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    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
      type: PropertyValue
      value: 0.561
    additional property: Instrumentalness
      type: PropertyValue
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    additional property: Liveness
      type: PropertyValue
      value: 0.235
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.242
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.336
    additional property: Key Name
      type: PropertyValue
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    additional property: Mode Name
      type: PropertyValue
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Tiễn Em Cuối Đường
type: MusicAlbum
date published: 2021-10-31

Cũng Một Chữ Tình
type: MusicAlbum
date published: 2021-11-15

Hoa Lòng Anh Vẫn Tím
type: MusicAlbum
date published: 2021-11-22

Cũng Một Chữ Tình
type: MusicAlbum
date published: 2021-11-24

Nỗi Nhớ Mưa Phai
type: MusicAlbum
date published: 2021-12-06

Nỗi Nhớ Mưa Phai
type: MusicAlbum
date published: 2021-12-08

Tình Nghèo
type: MusicAlbum
date published: 2022-01-01

Xuân Vắng Em
type: MusicAlbum
date published: 2022-01-19

Tình Bạn Tha Hương
type: MusicAlbum
date published: 2022-02-16

Khúc Tình Buồn Trong Mưa
type: MusicAlbum
date published: 2022-02-16

Lặng Lẽ Bên Người
type: MusicAlbum
date published: 2022-02-20

Những Ca Khúc Hay Của Ca Sĩ Mạnh Quỳnh
type: MusicAlbum
date published: 2022-02-21

Đường Tình 2 Lối Rẽ
type: MusicAlbum
date published: 2022-02-24

Vòng Tay Hạnh Phúc (Hạnh Phúc Đơn Sơ 3)
type: MusicAlbum
date published: 2022-02-27

Đường Tình Hai Lối Rẽ
type: MusicAlbum
date published: 2022-02-27

Hạnh Phúc Đơn Sơ 1,2,3
type: MusicAlbum
date published: 2022-03-06

Tìm Em Trong Kỷ Niệm
type: MusicAlbum
date published: 2022-05-06

Phượng Thắm Sân Trường
type: MusicAlbum
date published: 2022-06-22

Huệ Trắng Năm Xưa
type: MusicAlbum
date published: 2022-06-22

Mưa Bụi 2
type: MusicAlbum
date published: 2022-07-29

Trả
type: MusicAlbum
date published: 2022-08-11

Phiên Chợ Đời
type: MusicAlbum
date published: 2022-09-23

Thương Cha
type: MusicAlbum
date published: 2022-10-23

Khúc Tình Buồn Cho Em
type: MusicAlbum
date published: 2022-11-23

Thầy Tôi
type: MusicAlbum
date published: 2022-11-23

LK Người Đi Ngoài Phố - Qua Cơn Mê (Xuân Phát Tài 13)
type: MusicAlbum
date published: 2023-01-01

Anh Cho Em Mùa Xuân (lofi)
type: MusicAlbum
date published: 2023-01-04

Tình Nghèo
type: MusicAlbum
date published: 2023-01-12

Chuyện 3 Mùa Mưa
type: MusicAlbum
date published: 2023-01-17

Đừng Nói Xa Nhau
type: MusicAlbum
date published: 2023-01-17

Tình Nghèo
type: MusicAlbum
date published: 2023-01-19

LK Người Đi Ngoài Phố - Qua Cơn Mê (Beat, Xuân Phát Tài 13)
type: MusicAlbum
date published: 2023-02-06

Lệ Tình Buồn
type: MusicAlbum
date published: 2023-03-26

Xin Đừng Giận Anh
type: MusicAlbum
date published: 2023-05-24

Sao Lòng Còn Thương
type: MusicAlbum
date published: 2023-06-01

Thương Mãi Một Người
type: MusicAlbum
date published: 2023-06-05

Giữ Mãi Một Tình Yêu
type: MusicAlbum
date published: 2023-08-09

Mùa Vu Lan Nhớ Mẹ
type: MusicAlbum
date published: 2023-09-09

Bài Tình Ca Tân Hôn
type: MusicAlbum
date published: 2023-10-05

Ước Mộng Mùa Xuân
type: MusicAlbum
date published: 2023-10-05

Anh Hãy Về Đi
type: MusicAlbum
date published: 2023-12-04

Tủi Phận
type: MusicAlbum
date published: 2023-12-06

Liên Khúc Anh Hãy Về Đi/ Tủi Phận
type: MusicAlbum
date published: 2023-12-06

Đừng Hỏi Vì Sao
type: MusicAlbum
date published: 2023-12-16

Bài Ca Xuân Tặng Người
type: MusicAlbum
date published: 2024-01-16

Bài Ca Xuân Tặng Người
type: MusicAlbum
date published: 2024-01-18

Cho Nhau Nụ Cười Xuân
type: MusicAlbum
date published: 2024-03-06

Chuyến Trọ Trần
type: MusicAlbum
date published: 2024-05-27

Vì Đó Là Em
type: MusicAlbum
date published: 2024-10-25

Lời Nguyện Cầu
type: MusicAlbum
date published: 2024-10-27

Vì Đó Là Em
type: MusicAlbum
date published: 2024-10-27

Mạnh Quỳnh 1 - Hai Đứa Giận Nhau
type: MusicAlbum
date published: 2024-11-11

Mạnh Quỳnh 4 - Qua Lối Nhỏ
type: MusicAlbum
date published: 2025-03-02

Mạnh Quỳnh 8 - Xóm Đêm
type: MusicAlbum
date published: 2025-03-02

Mạnh Quỳnh 3 - Trả Lời Thư Em
type: MusicAlbum
date published: 2025-03-02

Mạnh Quỳnh 5 - Những Tình Khúc Tuổi Học Trò
type: MusicAlbum
date published: 2025-03-02

Mạnh Quỳnh 12 - Thương Hoài Ngàn Năm
type: MusicAlbum
date published: 2025-03-02

Mùa Xuân Lá Khô
type: MusicRecording
duration: PT5M3S
duration ms: 303840
explicit: false
by artist: Mạnh Quỳnh
in album: Rước Xuân Về Nhà
  type: MusicAlbum
  date published: 2006-01-01
isrc code: QM4TW2091111
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T13:38:39+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc34eecf190c2e4f59ebc5699f475b0b447ea69fad695158f18639479b4ed592f
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/QM4TW2091111
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 0xc34eecf190c2e4f59ebc5699f475b0b447ea69fad695158f18639479b4ed592f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2091111 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Mùa Xuân Lá Khô
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.667
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.417
  additional property: Energy
    type: PropertyValue
    value: 0.593
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.195
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.133
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.531
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.594
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Thiếu Phụ Nam Xương - Vọng Cổ
type: MusicRecording
duration: PT11M58S
duration ms: 718773
explicit: false
by artist: Mạnh Quỳnh
by artist: Hương Thủy
in album: Chân Dung Người Phụ Nữ Việt Nam, Vol.2
  type: MusicAlbum
  date published: 2008-01-01
isrc code: QM48F0741413
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T14:19:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdf2f67c4a4f82f874cb19ab60652b785260f972a901eed35f30ab7748924deba
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960418
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960418
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM48F0741413
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:20:15Z
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 0xdf2f67c4a4f82f874cb19ab60652b785260f972a901eed35f30ab7748924deba. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM48F0741413 — a six-check JSON result.
  date published: 2026-07-31T15:20:15Z
audio: Thiếu Phụ Nam Xương - Vọng Cổ
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 115.354
  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: 0.562
  additional property: Energy
    type: PropertyValue
    value: 0.315
  additional property: Speechiness
    type: PropertyValue
    value: 0.111
  additional property: Acousticness
    type: PropertyValue
    value: 0.785
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.077
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.509
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.465
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major