Nhạc Guitar Không Lời
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popularity: 19
followers: 91
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  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
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album: Nhạc Không Lời Buổi Sáng Hay Nhất
  type: MusicAlbum
  date published: 2023-12-20
album: Hòa Tấu Guitar Không Lời | Nhạc Rumba Phòng Trà Quán Cà Phê Hay Nhất Vol 1
  type: MusicAlbum
  date published: 2024-03-10
album: Hòa Tấu Guitar Không Lời | Nhạc Rumba Phòng Trà Quán Cà Phê Hay Nhất Vol 5
  type: MusicAlbum
  date published: 2024-03-10
album: Hòa Tấu Guiar Chọn Lọc Nghe 1 Lần Nhớ Mãi | Nhạc Không Lời Hải Ngoại Hay Nhất
  type: MusicAlbum
  date published: 2024-08-29
album: Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Không Lời Nghe Là Phê
  type: MusicAlbum
  date published: 2024-08-29
album: Hòa Tấu Rumba Guitar Cự Kỳ Hay | Nhạc Không Lời Hải Ngoại Chọn Lọc Hay Nhất
  type: MusicAlbum
  date published: 2024-08-29
album: Hòa Tấu Guitar Bất Hủ | Nhạc Không Lời Tuyển Chọn Hay Nhất 2024
  type: MusicAlbum
  date published: 2024-08-29
  track: Để Nhớ Một Thời Ta Đã Yêu - Hòa Tấu Guitar
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-16T08:56:51Z
    audio: Để Nhớ Một Thời Ta Đã Yêu - Hòa Tấu Guitar
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  track: Đừng Xa Em Đêm Nay - Hòa Tấu Guitar
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-16T22:02:53Z
    audio: Đừng Xa Em Đêm Nay - Hòa Tấu Guitar
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  track: Đừng Nói Xa Nhau - Hòa Tấu Guitar
  track: Căn Nhà Mộng Ước - Hòa Tấu Guitar
  track: Chuyện Tình Không Dĩ Vãng - Hòa Tấu Guitar
  track: Đời Tôi Cô Đơn - Hòa Tấu Guitar
  track: Em Về Kẻo Trời Mưa - Hòa Tấu Guitar
  track: Không Bao Giờ Quên Anh - Hòa Tấu Guitar
album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
album: Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Không Lời Bất Hủ | Nhạc Cà Phê Phòng Trà Buổi Sáng Vol 2
album: Hòa Tấu Rumba Không Lời Bất Hủ | Nhạc Cà Phê Phòng Trà Lắng Đọng Con Tim |
album: Hòa Tấu Rumba Không Lời Rót Mật Vào Tai | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
album: Hòa Tấu Guitar Không Lời Dâng Trào Cảm Xúc | Nhạc Cafe Phòng Trà Buổi Sáng | Nhạc Rumba Hải Ngoại
album: Hòa Tấu Guitar Không Lời Hải Ngoại | Nhạc Phòng Trà Cafe Buổi Sáng | Nhạc Rumba Bolero
album: Hòa Tấu Guitar Không Lời Nhẹ Nhàng Sâu Lắng | Nhạc Phòng Trà Cafe Buổi Sáng | Nhạc Rumba Hải Ngoại 1975
album: Hòa Tấu Guitar Không Lời Thư Thái Tâm Hồn | Nhạc Phòng Trà Cafe Buổi Sáng | Nhạc Rumba Hải Ngoại 1975
album: Hòa Tấu Guitar Nhạc Lính Trước 1975 | Nhạc Không Lời Hải Ngoại Hay Nhất | Nhạc Phòng Trà Quán Cà Phê
album: Hòa Tấu Guitar Nhạc Lính 1975 | Nhạc Rumba Phòng Trà Hải Ngoại | Nhạc Cà Phê Buổi Sáng Hay Nhất
album: Hòa Tấu Guitar Hải Ngoại Đặc Biệt | Nhạc Cà Phê Phòng Trà | Nhạc Không Lời Buổi Sáng Thư Giãn
album: Hòa Tấu Guitar Hải Ngoại 2025 | Nhạc Phòng Trà Quán Cafe | Nhạc Không Lời Buổi Sáng Thư Giãn
album: Hòa Tấu Guitar Hải Ngoại Hay Nhất | Nhạc Cà Phê Phòng Trà | Nhạc Không Lời Buổi Sáng Thư Giãn
album: Hòa Tấu Cha Cha Cha Không Lời | Nhạc Test Loa Hay Nhất 2025 (VOL 1)
album: Hòa Tấu Cha Cha Cha Hải Ngoại | Nhạc Test Loa Hay Nhất 2025 (VOL 2)
album: Hòa Tấu Cha Cha Cha Hay Quên Lối Về | Nhạc Test Loa Không Lời Hay Nhất 2025 (VOL 3)
album: Hòa Tấu Guitar Hải Ngoại | Nhạc Rumba Phòng Trà Hay Nhất 2025 | Nhạc Cà Phê Buổi Sáng
album: Hòa Tấu Cha Cha Cha Cực Hay | Nhạc Test Loa Không Lời Hay Nhất 2025 (VOL 4)
album: Hòa Tấu Guitar Bolero Trước 1975 | Nhạc Rumba Không Lời Hải Ngoại | Nhạc Phòng Trà Quán Cà Phê
album: Hòa Tấu Guitar Đặc Biệt Hay | Nhạc Rumba Không Lời Hải Ngoại | Nhạc Phòng Trà Chọn Lọc | Nhạc Cà Phê Buổi Sáng
album: Hòa Tấu Guitar Không Lời | Nhạc Phòng Trà Hải Ngoại | Nhạc Cà Phê Buổi Sáng 2025
album: Nhạc Guitar Không Lời Hải Ngoại | Hòa Tấu Rumba Bolero | Nhạc Phòng Trà Quán Cà Phê Hay Nhất
album: Hòa Tấu Guitar Slowrock Đặc Biệt Hay |Guitar Không Lời Hải Ngoại | Nhạc Phòng Trà Buổi Sáng Hay Nhất
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Bất Hủ
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 2
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 3
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 5
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Đắm Say Lòng Người

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Key Name
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Mode Name
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Đừng Nói Xa Nhau - Hòa Tấu Guitar
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-19T07:14:39Z
audio: Đừng Nói Xa Nhau - Hòa Tấu Guitar
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Căn Nhà Mộng Ước - Hòa Tấu Guitar
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-19T21:50:56Z
audio: Căn Nhà Mộng Ước - Hòa Tấu Guitar
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    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.49
  additional property: Energy
    type: PropertyValue
    value: 0.447
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.001
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.779
  additional property: Liveness
    type: PropertyValue
    value: 0.103
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.502
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.288
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Chuyện Tình Không Dĩ Vãng - Hòa Tấu Guitar
type: MusicRecording
duration: PT5M54S
duration ms: 354058
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Hòa Tấu Guitar Bất Hủ | Nhạc Không Lời Tuyển Chọn Hay Nhất 2024
  type: MusicAlbum
  date published: 2024-08-29
isrc code: QZTBA2496093
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T17:24:36+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x726b7c7e0e01ea3c4134a190c3c8e69ffb87ba0250e9866bbb7249693b1e116b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958761
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958761
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2496093
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T20:26:30Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726b7c7e0e01ea3c4134a190c3c8e69ffb87ba0250e9866bbb7249693b1e116b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2496093.
  date published: 2026-07-19T20:26:30Z
audio: Chuyện Tình Không Dĩ Vãng - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 82.003
  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: 0.535
  additional property: Energy
    type: PropertyValue
    value: 0.427
  additional property: Speechiness
    type: PropertyValue
    value: 0.028
  additional property: Acousticness
    type: PropertyValue
    value: 0.001
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.838
  additional property: Liveness
    type: PropertyValue
    value: 0.13
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.384
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.033
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Đời Tôi Cô Đơn - Hòa Tấu Guitar
type: MusicRecording
duration: PT5M37S
duration ms: 337543
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Hòa Tấu Guitar Bất Hủ | Nhạc Không Lời Tuyển Chọn Hay Nhất 2024
  type: MusicAlbum
  date published: 2024-08-29
isrc code: QZTBA2496094
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T01:49:32+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7861fed2f5fe809d12078d166814e4a625d3acb555aceec01200f7871cd28e85
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956861
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956861
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2496094
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T01:57:57Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7861fed2f5fe809d12078d166814e4a625d3acb555aceec01200f7871cd28e85. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTBA2496094.
  date published: 2026-07-06T01:57:57Z
audio: Đời Tôi Cô Đơn - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 80.978
  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: 0.558
  additional property: Energy
    type: PropertyValue
    value: 0.456
  additional property: Speechiness
    type: PropertyValue
    value: 0.026
  additional property: Acousticness
    type: PropertyValue
    value: 0.001
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.07
  additional property: Liveness
    type: PropertyValue
    value: 0.102
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.392
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.798
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Em Về Kẻo Trời Mưa - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M23S
duration ms: 263449
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Hòa Tấu Guitar Bất Hủ | Nhạc Không Lời Tuyển Chọn Hay Nhất 2024
  type: MusicAlbum
  date published: 2024-08-29
isrc code: QZTBA2496095
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T06:18:37+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfadc86b2c9c7ed55f8030454a8a528a8efa823f92bb8036a6e2d518ae8bc6528
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956776
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956776
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2496095
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-05T10:59:37Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadc86b2c9c7ed55f8030454a8a528a8efa823f92bb8036a6e2d518ae8bc6528. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBA2496095.
  date published: 2026-07-05T10:59:37Z
audio: Em Về Kẻo Trời Mưa - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 161.98
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.504
  additional property: Energy
    type: PropertyValue
    value: 0.505
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.003
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.664
  additional property: Liveness
    type: PropertyValue
    value: 0.175
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.684
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.784
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Không Bao Giờ Quên Anh - Hòa Tấu Guitar
type: MusicRecording
duration: PT6M15S
duration ms: 375609
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Hòa Tấu Guitar Bất Hủ | Nhạc Không Lời Tuyển Chọn Hay Nhất 2024
  type: MusicAlbum
  date published: 2024-08-29
isrc code: QZTBA2496097
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T12:26:40+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4520675ca09ac8ca09a5d5acaf5aad226ae8782dcd67d328f85cc99a954e0fb0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958880
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958880
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2496097
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T15:28:24Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4520675ca09ac8ca09a5d5acaf5aad226ae8782dcd67d328f85cc99a954e0fb0. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:24Z), 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/QZTBA2496097.
  date published: 2026-07-20T15:28:24Z
audio: Không Bao Giờ Quên Anh - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 162.087
  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: 0.492
  additional property: Energy
    type: PropertyValue
    value: 0.482
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.001
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.675
  additional property: Liveness
    type: PropertyValue
    value: 0.101
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.481
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.995
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
type: MusicAlbum
date published: 2024-09-04
track: Mười Năm Tình Cũ - Hòa Tấu Guitar Không Lời
  type: MusicRecording
  duration: PT5M23S
  duration ms: 323004
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
    type: MusicAlbum
    date published: 2024-09-04
  isrc code: QZTBD2458617
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T20:42:22+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4280f4ef22bb7451871f78e833aecf1e202d2297c9eeec1cef5bbaf84da90d83
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956620
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956620
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458617
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T07:11:13Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4280f4ef22bb7451871f78e833aecf1e202d2297c9eeec1cef5bbaf84da90d83. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZTBD2458617.
    date published: 2026-07-04T07:11:13Z
  audio: Mười Năm Tình Cũ - Hòa Tấu Guitar Không Lời
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 82.487
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.574
    additional property: Energy
      type: PropertyValue
      value: 0.308
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.304
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.844
    additional property: Liveness
      type: PropertyValue
      value: 0.127
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.267
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.793
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Anh Còn Nợ Em - Hòa Tấu Guitar Không Lời
  type: MusicRecording
  duration: PT5M3S
  duration ms: 303569
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
    type: MusicAlbum
    date published: 2024-09-04
  isrc code: QZTBA2496941
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T07:03:48+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x395b045aaf0f1fbdbe4f280565de70ba615fbc2fdc8641693a975a2426235a38
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958520
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958520
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2496941
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T08:19:09Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395b045aaf0f1fbdbe4f280565de70ba615fbc2fdc8641693a975a2426235a38. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTBA2496941.
    date published: 2026-07-18T08:19:09Z
  audio: Anh Còn Nợ Em - Hòa Tấu Guitar Không Lời
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 180.013
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.537
    additional property: Energy
      type: PropertyValue
      value: 0.401
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.046
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.171
    additional property: Liveness
      type: PropertyValue
      value: 0.077
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.289
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.165
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Biển Nỗi Nhớ Và Em - Hòa Tấu Guitar Không Lời
  type: MusicRecording
  duration: PT3M43S
  duration ms: 223124
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
    type: MusicAlbum
    date published: 2024-09-04
  isrc code: QZTBD2458618
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T22:50:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4556a0f45c5b902ded59bf60da6cc933797fc8aba161058219a54094cd6854a2
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956728
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956728
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458618
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Biển Nỗi Nhớ Và Em - Hòa Tấu Guitar Không Lời
track: Chờ Đông - Hòa Tấu Guitar Không Lời
track: Hà Nội Mùa Này Vắng Những Cơn Mưa - Hòa Tấu Guitar Không Lời
track: Hai Mùa Noel - Hòa Tấu Guitar Không Lời
track: Lâu Đài Tình Ái - Hòa Tấu Guitar Không Lời
track: Thao Thức Vì Em - Hòa Tấu Guitar Không Lời

OTSTimestamp
type: PropertyValue
value: 2026-07-05T01:43:49Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4556a0f45c5b902ded59bf60da6cc933797fc8aba161058219a54094cd6854a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBD2458618.
date published: 2026-07-05T01:43:49Z

Biển Nỗi Nhớ Và Em - Hòa Tấu Guitar Không Lời
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 168.034
additional property: Musical Key
  type: PropertyValue
  value: 10
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.506
additional property: Energy
  type: PropertyValue
  value: 0.337
additional property: Speechiness
  type: PropertyValue
  value: 0.028
additional property: Acousticness
  type: PropertyValue
  value: 0.126
additional property: Instrumentalness
  type: PropertyValue
  value: 0.76
additional property: Liveness
  type: PropertyValue
  value: 0.122
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.158
additional property: Loudness (dB)
  type: PropertyValue
  value: -14.496
additional property: Key Name
  type: PropertyValue
  value: Bb
additional property: Mode Name
  type: PropertyValue
  value: Minor

Chờ Đông - Hòa Tấu Guitar Không Lời
type: MusicRecording
duration: PT5M14S
duration ms: 314484
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
  type: MusicAlbum
  date published: 2024-09-04
isrc code: QZTBD2458619
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T22:17:37+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5d7eecb030c2adac5d5a69ffa51b4653d9adcc9c9758e9be66eb27be0707c3cf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958489
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958489
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458619
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T04:13:26Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7eecb030c2adac5d5a69ffa51b4653d9adcc9c9758e9be66eb27be0707c3cf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBD2458619.
  date published: 2026-07-18T04:13:26Z
audio: Chờ Đông - Hòa Tấu Guitar Không Lời
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 174.06
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.514
  additional property: Energy
    type: PropertyValue
    value: 0.247
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.294
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.938
  additional property: Liveness
    type: PropertyValue
    value: 0.357
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.244
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.744
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Hà Nội Mùa Này Vắng Những Cơn Mưa - Hòa Tấu Guitar Không Lời
type: MusicRecording
duration: PT4M9S
duration ms: 249564
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
  type: MusicAlbum
  date published: 2024-09-04
isrc code: QZTBD2458621
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T06:02:06+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x24846549b2081929e2c753330ccc14990e0496d76dcbc29f508b3f972fe1146c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958839
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958839
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458621
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T07:01:59Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24846549b2081929e2c753330ccc14990e0496d76dcbc29f508b3f972fe1146c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458621.
  date published: 2026-07-20T07:01:59Z
audio: Hà Nội Mùa Này Vắng Những Cơn Mưa - Hòa Tấu Guitar Không Lời
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 168.085
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.561
  additional property: Energy
    type: PropertyValue
    value: 0.27
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.223
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.658
  additional property: Liveness
    type: PropertyValue
    value: 0.086
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.136
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.757
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Hai Mùa Noel - Hòa Tấu Guitar Không Lời
type: MusicRecording
duration: PT5M28S
duration ms: 328764
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
  type: MusicAlbum
  date published: 2024-09-04
isrc code: QZTBD2458622
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T06:57:16+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa7c7991c836f88192ad4b6944af949fc684f8cab93bb10d12522b41747770938
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956639
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956639
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458622
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T11:19:20Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7991c836f88192ad4b6944af949fc684f8cab93bb10d12522b41747770938. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBD2458622.
  date published: 2026-07-04T11:19:20Z
audio: Hai Mùa Noel - Hòa Tấu Guitar Không Lời
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 173.969
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.564
  additional property: Energy
    type: PropertyValue
    value: 0.272
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.289
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.817
  additional property: Liveness
    type: PropertyValue
    value: 0.111
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.336
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.803
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Lâu Đài Tình Ái - Hòa Tấu Guitar Không Lời
type: MusicRecording
duration: PT4M47S
duration ms: 287244
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
  type: MusicAlbum
  date published: 2024-09-04
isrc code: QZTBD2458623
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T16:17:22+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0ea636d3741a9c13aa3e3b16a43a507d9f0cc88259ac45ee5010b3cb6f3ac19c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958601
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958601
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458623
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T19:27:02Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea636d3741a9c13aa3e3b16a43a507d9f0cc88259ac45ee5010b3cb6f3ac19c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBD2458623.
  date published: 2026-07-18T19:27:02Z
audio: Lâu Đài Tình Ái - Hòa Tấu Guitar Không Lời
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 174.013
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.528
  additional property: Energy
    type: PropertyValue
    value: 0.308
  additional property: Speechiness
    type: PropertyValue
    value: 0.033
  additional property: Acousticness
    type: PropertyValue
    value: 0.177
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.853
  additional property: Liveness
    type: PropertyValue
    value: 0.121
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.289
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.339
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Thao Thức Vì Em - Hòa Tấu Guitar Không Lời
type: MusicRecording
duration: PT5M18S
duration ms: 318284
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Hòa Tấu Guitar Không Lời | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
  type: MusicAlbum
  date published: 2024-09-04
isrc code: QZTBD2458625
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T16:29:13+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x37d256723bd19c611b063d7fb5be7ef4cd7d5407a2f370c9ed41aa05008332cf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958761
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958761
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBD2458625
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T17:49:48Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d256723bd19c611b063d7fb5be7ef4cd7d5407a2f370c9ed41aa05008332cf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBD2458625.
  date published: 2026-07-19T17:49:48Z
audio: Thao Thức Vì Em - Hòa Tấu Guitar Không Lời
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 173.939
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.527
  additional property: Energy
    type: PropertyValue
    value: 0.292
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.373
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.852
  additional property: Liveness
    type: PropertyValue
    value: 0.118
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.267
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.44
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Không Lời Bất Hủ | Nhạc Cà Phê Phòng Trà Buổi Sáng Vol 2
type: MusicAlbum
date published: 2025-02-03

Hòa Tấu Rumba Không Lời Bất Hủ | Nhạc Cà Phê Phòng Trà Lắng Đọng Con Tim |
type: MusicAlbum
date published: 2025-02-04

Hòa Tấu Rumba Không Lời Rót Mật Vào Tai | Nhạc Cà Phê Phòng Trà Bất Hủ | Nhạc Buổi Sáng Thư Giãn
type: MusicAlbum
date published: 2025-02-04

Hòa Tấu Guitar Không Lời Dâng Trào Cảm Xúc | Nhạc Cafe Phòng Trà Buổi Sáng | Nhạc Rumba Hải Ngoại
type: MusicAlbum
date published: 2025-02-09

Hòa Tấu Guitar Không Lời Hải Ngoại | Nhạc Phòng Trà Cafe Buổi Sáng | Nhạc Rumba Bolero
type: MusicAlbum
date published: 2025-02-09

Hòa Tấu Guitar Không Lời Nhẹ Nhàng Sâu Lắng | Nhạc Phòng Trà Cafe Buổi Sáng | Nhạc Rumba Hải Ngoại 1975
type: MusicAlbum
date published: 2025-02-09

Hòa Tấu Guitar Không Lời Thư Thái Tâm Hồn | Nhạc Phòng Trà Cafe Buổi Sáng | Nhạc Rumba Hải Ngoại 1975
type: MusicAlbum
date published: 2025-02-09

Hòa Tấu Guitar Nhạc Lính Trước 1975 | Nhạc Không Lời Hải Ngoại Hay Nhất | Nhạc Phòng Trà Quán Cà Phê
type: MusicAlbum
date published: 2025-02-10

Hòa Tấu Guitar Nhạc Lính 1975 | Nhạc Rumba Phòng Trà Hải Ngoại | Nhạc Cà Phê Buổi Sáng Hay Nhất
type: MusicAlbum
date published: 2025-02-10

Hòa Tấu Guitar Hải Ngoại Đặc Biệt | Nhạc Cà Phê Phòng Trà | Nhạc Không Lời Buổi Sáng Thư Giãn
type: MusicAlbum
date published: 2025-02-10

Hòa Tấu Guitar Hải Ngoại 2025 | Nhạc Phòng Trà Quán Cafe | Nhạc Không Lời Buổi Sáng Thư Giãn
type: MusicAlbum
date published: 2025-02-19

Hòa Tấu Guitar Hải Ngoại Hay Nhất | Nhạc Cà Phê Phòng Trà | Nhạc Không Lời Buổi Sáng Thư Giãn
type: MusicAlbum
date published: 2025-02-20

Hòa Tấu Cha Cha Cha Không Lời | Nhạc Test Loa Hay Nhất 2025 (VOL 1)
type: MusicAlbum
date published: 2025-02-21

Hòa Tấu Cha Cha Cha Hải Ngoại | Nhạc Test Loa Hay Nhất 2025 (VOL 2)
type: MusicAlbum
date published: 2025-02-24

Hòa Tấu Cha Cha Cha Hay Quên Lối Về | Nhạc Test Loa Không Lời Hay Nhất 2025 (VOL 3)
type: MusicAlbum
date published: 2025-02-26

Hòa Tấu Guitar Hải Ngoại | Nhạc Rumba Phòng Trà Hay Nhất 2025 | Nhạc Cà Phê Buổi Sáng
type: MusicAlbum
date published: 2025-02-27

Hòa Tấu Cha Cha Cha Cực Hay | Nhạc Test Loa Không Lời Hay Nhất 2025 (VOL 4)
type: MusicAlbum
date published: 2025-02-28

Hòa Tấu Guitar Bolero Trước 1975 | Nhạc Rumba Không Lời Hải Ngoại | Nhạc Phòng Trà Quán Cà Phê
type: MusicAlbum
date published: 2025-02-28

Hòa Tấu Guitar Đặc Biệt Hay | Nhạc Rumba Không Lời Hải Ngoại | Nhạc Phòng Trà Chọn Lọc | Nhạc Cà Phê Buổi Sáng
type: MusicAlbum
date published: 2025-03-01

Hòa Tấu Guitar Không Lời | Nhạc Phòng Trà Hải Ngoại | Nhạc Cà Phê Buổi Sáng 2025
type: MusicAlbum
date published: 2025-03-01

Nhạc Guitar Không Lời Hải Ngoại | Hòa Tấu Rumba Bolero | Nhạc Phòng Trà Quán Cà Phê Hay Nhất
type: MusicAlbum
date published: 2025-03-03

Hòa Tấu Guitar Slowrock Đặc Biệt Hay |Guitar Không Lời Hải Ngoại | Nhạc Phòng Trà Buổi Sáng Hay Nhất
type: MusicAlbum
date published: 2025-03-05
track: Đêm Lang Thang - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT6M23S
  duration ms: 383924
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Hòa Tấu Guitar Slowrock Đặc Biệt Hay |Guitar Không Lời Hải Ngoại | Nhạc Phòng Trà Buổi Sáng Hay Nhất
    type: MusicAlbum
    date published: 2025-03-05
  isrc code: QZHN52519434
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T06:58:08+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7b8262491c606e83ef37ca539fbfbc7ec3f640aadb1d8b18ffd0a1d902a58d59
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958846
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958846
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52519434
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T09:59:53Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8262491c606e83ef37ca539fbfbc7ec3f640aadb1d8b18ffd0a1d902a58d59. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T09:59:53Z), 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/QZHN52519434.
    date published: 2026-07-20T09:59:53Z
  audio: Đêm Lang Thang - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 83.973
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.601
    additional property: Energy
      type: PropertyValue
      value: 0.239
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.346
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.839
    additional property: Liveness
      type: PropertyValue
      value: 0.078
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.246
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.968
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà
type: MusicAlbum
date published: 2025-03-30

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
type: MusicAlbum
date published: 2025-04-22
track: Nàng Áo Tím - Hòa Tấu Rumba
  type: MusicRecording
  duration: PT4M47S
  duration ms: 287844
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
    type: MusicAlbum
    date published: 2025-04-22
  isrc code: QZNWQ2545959
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T17:38:15+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc9ae4be47278635745c209ddb8d1ae293b4419eb2f2855e486d76113463cdd39
  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/QZNWQ2545959
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ae4be47278635745c209ddb8d1ae293b4419eb2f2855e486d76113463cdd39. 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/QZNWQ2545959.
    date published: 2026-07-17T19:12:23Z
  audio: Nàng Áo Tím - Hòa Tấu Rumba
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 170.08
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.546
    additional property: Energy
      type: PropertyValue
      value: 0.538
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.182
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.903
    additional property: Liveness
      type: PropertyValue
      value: 0.109
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.822
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.039
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Những Lời Này Cho Em - Hòa Tấu Rumba
  type: MusicRecording
  duration: PT4M36S
  duration ms: 276044
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
    type: MusicAlbum
    date published: 2025-04-22
  isrc code: QZNWQ2545960
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T17:48:36+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x488c969fa958c46596a8af95059a701570d363d4ab1764443c73086df7e2dc98
  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/QZNWQ2545960
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488c969fa958c46596a8af95059a701570d363d4ab1764443c73086df7e2dc98. 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/QZNWQ2545960.
    date published: 2026-07-03T19:59:51Z
  audio: Những Lời Này Cho Em - Hòa Tấu Rumba
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 162.029
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.632
    additional property: Energy
      type: PropertyValue
      value: 0.56
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.096
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.682
    additional property: Liveness
      type: PropertyValue
      value: 0.058
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.729
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.951
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Phố Đêm - Hòa Tấu Rumba
  type: MusicRecording
  duration: PT6M20S
  duration ms: 380924
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
    type: MusicAlbum
    date published: 2025-04-22
  isrc code: QZNWQ2545961
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T03:02:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x59645b9ae6610ab1def6a569f0a4fabe573bf9460a52478e238eec88e4513014
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956776
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956776
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2545961
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Phố Đêm - Hòa Tấu Rumba
track: Sao Chưa Thấy Hồi Ấm - Hòa Tấu Rumba
track: Sầu Tím Thiệp Hồng - Hòa Tấu Rumba
track: Tâm Sự Đời Tôi - Hòa Tấu Rumba
track: Thiệp Hồng Anh Viết Tên Em - Hòa Tấu Rumba
track: Tôi Chưa Có Mùa Xuân - Hòa Tấu Rumba

OTSTimestamp
type: PropertyValue
value: 2026-07-05T10:59:37Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59645b9ae6610ab1def6a569f0a4fabe573bf9460a52478e238eec88e4513014. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWQ2545961.
date published: 2026-07-05T10:59:37Z

Phố Đêm - Hòa Tấu Rumba
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 158.018
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: 0.491
additional property: Energy
  type: PropertyValue
  value: 0.562
additional property: Speechiness
  type: PropertyValue
  value: 0.037
additional property: Acousticness
  type: PropertyValue
  value: 0.196
additional property: Instrumentalness
  type: PropertyValue
  value: 0.949
additional property: Liveness
  type: PropertyValue
  value: 0.045
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.691
additional property: Loudness (dB)
  type: PropertyValue
  value: -11.471
additional property: Key Name
  type: PropertyValue
  value: B
additional property: Mode Name
  type: PropertyValue
  value: Minor

Sao Chưa Thấy Hồi Ấm - Hòa Tấu Rumba
type: MusicRecording
duration: PT6M35S
duration ms: 395284
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
  type: MusicAlbum
  date published: 2025-04-22
isrc code: QZNWQ2545962
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T08:37:22+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf1ee0f607ccd5a0b8f458605d68aff30893deac4848e554c264a8753d94700a6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958388
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958388
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2545962
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T09:14:21Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ee0f607ccd5a0b8f458605d68aff30893deac4848e554c264a8753d94700a6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWQ2545962.
  date published: 2026-07-17T09:14:21Z
audio: Sao Chưa Thấy Hồi Ấm - Hòa Tấu Rumba
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 158.045
  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: 0.514
  additional property: Energy
    type: PropertyValue
    value: 0.57
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.108
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.971
  additional property: Liveness
    type: PropertyValue
    value: 0.28
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.598
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.237
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sầu Tím Thiệp Hồng - Hòa Tấu Rumba
type: MusicRecording
duration: PT6M5S
duration ms: 365844
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
  type: MusicAlbum
  date published: 2025-04-22
isrc code: QZNWQ2545963
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-15T08:34:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xac45c17315dc6490639a1e8d4629a2dbd6d8fdd5fdc564c741337f4ac1b60387
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958134
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958134
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2545963
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T11:38:39Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac45c17315dc6490639a1e8d4629a2dbd6d8fdd5fdc564c741337f4ac1b60387. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:39Z), 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/QZNWQ2545963.
  date published: 2026-07-15T11:38:39Z
audio: Sầu Tím Thiệp Hồng - Hòa Tấu Rumba
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 161.912
  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: 0.531
  additional property: Energy
    type: PropertyValue
    value: 0.624
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.001
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.568
  additional property: Liveness
    type: PropertyValue
    value: 0.068
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.682
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.634
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Tâm Sự Đời Tôi - Hòa Tấu Rumba
type: MusicRecording
duration: PT7M1S
duration ms: 421244
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
  type: MusicAlbum
  date published: 2025-04-22
isrc code: QZNWQ2545964
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T18:22:45+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd011f137a5bf952bed8be9b7f52760fd44669a81269ea82abd47789bdcccab38
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958601
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958601
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2545964
additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd011f137a5bf952bed8be9b7f52760fd44669a81269ea82abd47789bdcccab38. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWQ2545964.
  date published: 2026-07-18T19:27:02Z
audio: Tâm Sự Đời Tôi - Hòa Tấu Rumba
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 158.097
  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: 0.566
  additional property: Energy
    type: PropertyValue
    value: 0.541
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.078
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.971
  additional property: Liveness
    type: PropertyValue
    value: 0.045
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.772
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.567
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Thiệp Hồng Anh Viết Tên Em - Hòa Tấu Rumba
type: MusicRecording
duration: PT4M45S
duration ms: 285484
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
  type: MusicAlbum
  date published: 2025-04-22
isrc code: QZNWQ2545965
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T18:40:48+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbddb8a510e58c02be4ed7daa94e186af4bdff560691df519d50ffd7129fadb72
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958447
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958447
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2545965
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T19:47:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddb8a510e58c02be4ed7daa94e186af4bdff560691df519d50ffd7129fadb72. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWQ2545965.
  date published: 2026-07-17T19:47:19Z
audio: Thiệp Hồng Anh Viết Tên Em - Hòa Tấu Rumba
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 166
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.584
  additional property: Energy
    type: PropertyValue
    value: 0.568
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.19
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.746
  additional property: Liveness
    type: PropertyValue
    value: 0.117
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.724
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.962
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Tôi Chưa Có Mùa Xuân - Hòa Tấu Rumba
type: MusicRecording
duration: PT5M4S
duration ms: 304484
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Vol 2
  type: MusicAlbum
  date published: 2025-04-22
isrc code: QZNWQ2545966
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T12:08:22+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf65427d605e6da5479bd9ed71074cb1621d20057083d1855a4879cc6096572d8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958878
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958878
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2545966
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T15:08:35Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65427d605e6da5479bd9ed71074cb1621d20057083d1855a4879cc6096572d8. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:08:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2545966.
  date published: 2026-07-20T15:08:35Z
audio: Tôi Chưa Có Mùa Xuân - Hòa Tấu Rumba
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 169.99
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.528
  additional property: Energy
    type: PropertyValue
    value: 0.594
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.147
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.804
  additional property: Liveness
    type: PropertyValue
    value: 0.132
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.775
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.139
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Bất Hủ
type: MusicAlbum
date published: 2025-06-25

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 2
type: MusicAlbum
date published: 2025-07-10

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 3
type: MusicAlbum
date published: 2025-07-25
track: Lan Và Điệp - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT4M59S
  duration ms: 299884
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 3
    type: MusicAlbum
    date published: 2025-07-25
  isrc code: QZTB72511040
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T03:47:11+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xbcbfa2fa74b6186427bf17707cc1fc01687356ff276c7f48e6a4f1ff3fd11d61
  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/QZTB72511040
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbfa2fa74b6186427bf17707cc1fc01687356ff276c7f48e6a4f1ff3fd11d61. 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/QZTB72511040.
    date published: 2026-07-05T10:01:46Z
  audio: Lan Và Điệp - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 78.015
    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: 0.598
    additional property: Energy
      type: PropertyValue
      value: 0.375
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.007
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.565
    additional property: Liveness
      type: PropertyValue
      value: 0.112
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.665
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.551
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Đồi Thông Hai Mộ - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT4M55S
  duration ms: 295364
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 3
    type: MusicAlbum
    date published: 2025-07-25
  isrc code: QZTB72511043
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T07:30:04+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb70040f11ae799e13cc10b97ebc17115c55506ec8886c2c08e6e232825a05ea8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957820
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957820
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB72511043
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-13T07:54:01Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70040f11ae799e13cc10b97ebc17115c55506ec8886c2c08e6e232825a05ea8. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTB72511043.
    date published: 2026-07-13T07:54:01Z
  audio: Đồi Thông Hai Mộ - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 78.018
    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: 0.627
    additional property: Energy
      type: PropertyValue
      value: 0.41
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.016
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.677
    additional property: Liveness
      type: PropertyValue
      value: 0.116
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.695
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.33
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Chuyện Hoa Sim - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT5M23S
  duration ms: 323924
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 3
    type: MusicAlbum
    date published: 2025-07-25
  isrc code: QZTB72511044
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T10:20:58+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2aa43d7068a3cd73cd3d39631e5b939a6d61ae06a0138abdef25fca0b2bc41a1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958867
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958867
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB72511044
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Chuyện Hoa Sim - Hòa Tấu Guitar

OTSTimestamp
type: PropertyValue
value: 2026-07-20T13:22:42Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa43d7068a3cd73cd3d39631e5b939a6d61ae06a0138abdef25fca0b2bc41a1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:22:42Z), 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/QZTB72511044.
date published: 2026-07-20T13:22:42Z

Chuyện Hoa Sim - Hòa Tấu Guitar
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 78.027
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: 0.567
additional property: Energy
  type: PropertyValue
  value: 0.403
additional property: Speechiness
  type: PropertyValue
  value: 0.029
additional property: Acousticness
  type: PropertyValue
  value: 0.004
additional property: Instrumentalness
  type: PropertyValue
  value: 0.779
additional property: Liveness
  type: PropertyValue
  value: 0.109
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.543
additional property: Loudness (dB)
  type: PropertyValue
  value: -15.932
additional property: Key Name
  type: PropertyValue
  value: B
additional property: Mode Name
  type: PropertyValue
  value: Minor

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
type: MusicAlbum
date published: 2025-08-10
track: Những Đồi Hoa Sim - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT6M5S
  duration ms: 365066
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
    type: MusicAlbum
    date published: 2025-08-10
  isrc code: QZHN42484261
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T23:35:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7545a1298174d46c6677a1d338ffab4613b82048e33dd93701caf73919932bb9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958798
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958798
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484261
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T02:37:28Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7545a1298174d46c6677a1d338ffab4613b82048e33dd93701caf73919932bb9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:28Z), 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/QZHN42484261.
    date published: 2026-07-20T02:37:28Z
  audio: Những Đồi Hoa Sim - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 161.948
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.53
    additional property: Energy
      type: PropertyValue
      value: 0.496
    additional property: Speechiness
      type: PropertyValue
      value: 0.032
    additional property: Acousticness
      type: PropertyValue
      value: 0.001
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.806
    additional property: Liveness
      type: PropertyValue
      value: 0.101
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.384
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.948
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Phố Đêm - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT5M23S
  duration ms: 323640
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
    type: MusicAlbum
    date published: 2025-08-10
  isrc code: QZHN42484262
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T06:35:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x1896dfc113d5d69e26d4111de03ff3c01b7ce8a0ca1c9a54d6353bec31bff4b9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956776
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956776
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484262
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T10:59:37Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1896dfc113d5d69e26d4111de03ff3c01b7ce8a0ca1c9a54d6353bec31bff4b9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN42484262.
    date published: 2026-07-05T10:59:37Z
  audio: Phố Đêm - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 166.017
    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: 0.482
    additional property: Energy
      type: PropertyValue
      value: 0.423
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.005
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.216
    additional property: Liveness
      type: PropertyValue
      value: 0.113
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.414
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.787
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Quán Nửa Khuya - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT5M53S
  duration ms: 353209
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
    type: MusicAlbum
    date published: 2025-08-10
  isrc code: QZHN42484263
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T03:56:09+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe784869dde821a46a4582941c7d1cf6f7ab5a3307670385577a970534b47dd16
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956889
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956889
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484263
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Quán Nửa Khuya - Hòa Tấu Guitar
track: Thương Hoài Ngàn Năm
track: Trộm Nhìn Nhau - Hòa Tấu Guitar
track: Xin Anh Giữ Trọn Tình Quê - Hòa Tấu Guitar

OTSTimestamp
type: PropertyValue
value: 2026-07-06T06:56:49Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe784869dde821a46a4582941c7d1cf6f7ab5a3307670385577a970534b47dd16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN42484263.
date published: 2026-07-06T06:56:49Z

Quán Nửa Khuya - Hòa Tấu Guitar
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 82.977
additional property: Musical Key
  type: PropertyValue
  value: 8
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.578
additional property: Energy
  type: PropertyValue
  value: 0.477
additional property: Speechiness
  type: PropertyValue
  value: 0.03
additional property: Acousticness
  type: PropertyValue
  value: 0.002
additional property: Instrumentalness
  type: PropertyValue
  value: 0.716
additional property: Liveness
  type: PropertyValue
  value: 0.12
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.423
additional property: Loudness (dB)
  type: PropertyValue
  value: -13.136
additional property: Key Name
  type: PropertyValue
  value: Ab
additional property: Mode Name
  type: PropertyValue
  value: Major

Thương Hoài Ngàn Năm
type: MusicRecording
duration: PT4M9S
duration ms: 249068
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
  type: MusicAlbum
  date published: 2025-08-10
isrc code: QZHN42484265
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T13:20:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc79d1981345d248404b7410ae2270661d9800d940fc6b56678e6b4ca20e587a8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958897
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958897
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484265
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T16:23:14Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79d1981345d248404b7410ae2270661d9800d940fc6b56678e6b4ca20e587a8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:14Z), 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/QZHN42484265.
  date published: 2026-07-20T16:23:14Z
audio: Thương Hoài Ngàn Năm
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 82.971
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.561
  additional property: Energy
    type: PropertyValue
    value: 0.449
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.018
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.865
  additional property: Liveness
    type: PropertyValue
    value: 0.143
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.54
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.155
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Trộm Nhìn Nhau - Hòa Tấu Guitar
type: MusicRecording
duration: PT5M33S
duration ms: 333857
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
  type: MusicAlbum
  date published: 2025-08-10
isrc code: QZHN42484267
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T02:26:06+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x82538c28c25ce9a43c8b13bf7d8993655aea292869d8578d7ac3d8c2ad524675
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956891
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956891
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484267
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T07:16:32Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82538c28c25ce9a43c8b13bf7d8993655aea292869d8578d7ac3d8c2ad524675. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN42484267.
  date published: 2026-07-06T07:16:32Z
audio: Trộm Nhìn Nhau - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 161.885
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.559
  additional property: Energy
    type: PropertyValue
    value: 0.497
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.004
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.907
  additional property: Liveness
    type: PropertyValue
    value: 0.324
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.54
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.26
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Xin Anh Giữ Trọn Tình Quê - Hòa Tấu Guitar
type: MusicRecording
duration: PT5M11S
duration ms: 311965
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 4
  type: MusicAlbum
  date published: 2025-08-10
isrc code: QZHN42484269
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T06:46:45+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe548fd19badeb1127dd9f6eaaad8ef1429678aaa6c5e9b4f0f44558d67824cd5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956894
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956894
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484269
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T07:53:57Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe548fd19badeb1127dd9f6eaaad8ef1429678aaa6c5e9b4f0f44558d67824cd5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN42484269.
  date published: 2026-07-06T07:53:57Z
audio: Xin Anh Giữ Trọn Tình Quê - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 165.971
  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: 0.469
  additional property: Energy
    type: PropertyValue
    value: 0.499
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.004
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.811
  additional property: Liveness
    type: PropertyValue
    value: 0.349
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.361
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.455
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 5
type: MusicAlbum
date published: 2025-08-25
track: Thành Phố Mưa Bay - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT4M32S
  duration ms: 272309
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 5
    type: MusicAlbum
    date published: 2025-08-25
  isrc code: QZWFP2352725
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T01:23:48+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe6d873102939f1a4d6b21834d6f7d44cf9c8e1e992bb979b9e03fd94b9cb8734
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958484
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958484
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2352725
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T03:34:53Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d873102939f1a4d6b21834d6f7d44cf9c8e1e992bb979b9e03fd94b9cb8734. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFP2352725.
    date published: 2026-07-18T03:34:53Z
  audio: Thành Phố Mưa Bay - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 159.953
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.502
    additional property: Energy
      type: PropertyValue
      value: 0.415
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.005
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.789
    additional property: Liveness
      type: PropertyValue
      value: 0.075
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.376
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.315
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Nhịp Cầu Tri Âm - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT6M7S
  duration ms: 367010
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 5
    type: MusicAlbum
    date published: 2025-08-25
  isrc code: QZWFP2352732
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T08:20:11+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2b421f4924f374676136c7f6e092a71fcbbcb94aaa0a67504054ae634b586561
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958853
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958853
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2352732
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T11:22:51Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b421f4924f374676136c7f6e092a71fcbbcb94aaa0a67504054ae634b586561. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:22:51Z), 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/QZWFP2352732.
    date published: 2026-07-20T11:22:51Z
  audio: Nhịp Cầu Tri Âm - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 80
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.569
    additional property: Energy
      type: PropertyValue
      value: 0.452
    additional property: Speechiness
      type: PropertyValue
      value: 0.03
    additional property: Acousticness
      type: PropertyValue
      value: 0.004
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.177
    additional property: Liveness
      type: PropertyValue
      value: 0.186
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.457
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.09
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Những Đóm Mắt Hỏa Châu - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT5M38S
  duration ms: 338450
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 5
    type: MusicAlbum
    date published: 2025-08-25
  isrc code: QZWFP2352731
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T00:29:56+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x21d1562bf61f03a348251bb42c810ab9354a4a3d51b54f83247b1d9f14887afa
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958802
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958802
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2352731
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Những Đóm Mắt Hỏa Châu - Hòa Tấu Guitar
track: Sau Lần Hẹn Cuối - Hòa Tấu Guitar
track: Sầu Lẻ Bóng - Hòa Tấu Guitar

OTSTimestamp
type: PropertyValue
value: 2026-07-20T01:04:02Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d1562bf61f03a348251bb42c810ab9354a4a3d51b54f83247b1d9f14887afa. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFP2352731.
date published: 2026-07-20T01:04:02Z

Những Đóm Mắt Hỏa Châu - Hòa Tấu Guitar
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 160.008
additional property: Musical Key
  type: PropertyValue
  value: 3
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.539
additional property: Energy
  type: PropertyValue
  value: 0.459
additional property: Speechiness
  type: PropertyValue
  value: 0.029
additional property: Acousticness
  type: PropertyValue
  value: 0.003
additional property: Instrumentalness
  type: PropertyValue
  value: 0.06
additional property: Liveness
  type: PropertyValue
  value: 0.055
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.525
additional property: Loudness (dB)
  type: PropertyValue
  value: -13.003
additional property: Key Name
  type: PropertyValue
  value: Eb
additional property: Mode Name
  type: PropertyValue
  value: Minor

Sau Lần Hẹn Cuối - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M26S
duration ms: 266410
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 5
  type: MusicAlbum
  date published: 2025-08-25
isrc code: QZWFP2352729
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T06:50:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbfdfdda691c1456b8e2d18fe322942b4ad74bbe48de337d322840e93b2500c4f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958839
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958839
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2352729
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T09:52:28Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdfdda691c1456b8e2d18fe322942b4ad74bbe48de337d322840e93b2500c4f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:52:28Z), 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/QZWFP2352729.
  date published: 2026-07-20T09:52:28Z
audio: Sau Lần Hẹn Cuối - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 159.989
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.521
  additional property: Energy
    type: PropertyValue
    value: 0.441
  additional property: Speechiness
    type: PropertyValue
    value: 0.026
  additional property: Acousticness
    type: PropertyValue
    value: 0.002
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.071
  additional property: Liveness
    type: PropertyValue
    value: 0.177
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.629
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.498
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sầu Lẻ Bóng - Hòa Tấu Guitar
type: MusicRecording
duration: PT5M25S
duration ms: 325686
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 5
  type: MusicAlbum
  date published: 2025-08-25
isrc code: QZWFP2352728
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T19:52:37+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xad8c40a2b3a01240b5ef2686405cd4c697cca8c426486b9b1ac684b5966346d8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958775
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958775
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2352728
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T20:13:58Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c40a2b3a01240b5ef2686405cd4c697cca8c426486b9b1ac684b5966346d8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZWFP2352728.
  date published: 2026-07-19T20:13:58Z
audio: Sầu Lẻ Bóng - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 161.975
  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: 0.519
  additional property: Energy
    type: PropertyValue
    value: 0.451
  additional property: Speechiness
    type: PropertyValue
    value: 0.027
  additional property: Acousticness
    type: PropertyValue
    value: 0.004
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.205
  additional property: Liveness
    type: PropertyValue
    value: 0.063
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.451
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.174
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
type: MusicAlbum
date published: 2025-09-10
track: Ba Tháng Tạ Từ - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT4M40S
  duration ms: 280538
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
    type: MusicAlbum
    date published: 2025-09-10
  isrc code: QZWFP2317448
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T01:57:13+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xedcc7b6804c3c235d6643e4cf38737f510b72891fef850bbaa6dbbf2219b669f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958224
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958224
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317448
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T05:00:00Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcc7b6804c3c235d6643e4cf38737f510b72891fef850bbaa6dbbf2219b669f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317448.
    date published: 2026-07-16T05:00:00Z
  audio: Ba Tháng Tạ Từ - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 160.02
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.545
    additional property: Energy
      type: PropertyValue
      value: 0.46
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.009
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.936
    additional property: Liveness
      type: PropertyValue
      value: 0.301
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.572
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.763
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Hoa Sứ Nhà Nàng - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT4M18S
  duration ms: 258922
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
    type: MusicAlbum
    date published: 2025-09-10
  isrc code: QZWFP2317457
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T07:07:41+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8de861b21986d4a3c14dc4bb4e671e93c178ed58bd18cead7f74ba03ec123f5f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956474
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956474
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317457
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T08:56:35Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de861b21986d4a3c14dc4bb4e671e93c178ed58bd18cead7f74ba03ec123f5f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317457.
    date published: 2026-07-03T08:56:35Z
  audio: Hoa Sứ Nhà Nàng - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 159.993
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.495
    additional property: Energy
      type: PropertyValue
      value: 0.484
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.009
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.417
    additional property: Liveness
      type: PropertyValue
      value: 0.293
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.565
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.363
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Cánh Buồm Chuyển Bến - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT5M18S
  duration ms: 318502
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
    type: MusicAlbum
    date published: 2025-09-10
  isrc code: QZWFP2317449
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T13:38:39+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8e161dd7dcb68b0a6907b0a74ad21b898284557c2c5dad9b6a68d91b455e9d25
  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/QZWFP2317449
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Cánh Buồm Chuyển Bến - Hòa Tấu Guitar
track: Chiều Hạ Vàng - Hòa Tấu Guitar
track: Chuyện Ba Mùa Mưa - Hòa Tấu Guitar
track: Chuyện Ba Người - Hòa Tấu Guitar
track: Chuyện Đêm Mưa - Hòa Tấu Guitar
track: Đường Xưa Lối Cũ - Hòa Tấu Guitar
track: Giã Từ - Hòa Tấu Guitar
track: Ai Nhớ Chăng Ai - Hòa Tấu Guitar

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e161dd7dcb68b0a6907b0a74ad21b898284557c2c5dad9b6a68d91b455e9d25. 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/QZWFP2317449.
date published: 2026-07-03T19:59:51Z

Cánh Buồm Chuyển Bến - Hòa Tấu Guitar
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 79.989
additional property: Musical Key
  type: PropertyValue
  value: 8
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.562
additional property: Energy
  type: PropertyValue
  value: 0.467
additional property: Speechiness
  type: PropertyValue
  value: 0.031
additional property: Acousticness
  type: PropertyValue
  value: 0.001
additional property: Instrumentalness
  type: PropertyValue
  value: 0.156
additional property: Liveness
  type: PropertyValue
  value: 0.07
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.443
additional property: Loudness (dB)
  type: PropertyValue
  value: -12.64
additional property: Key Name
  type: PropertyValue
  value: Ab
additional property: Mode Name
  type: PropertyValue
  value: Minor

Chiều Hạ Vàng - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M42S
duration ms: 282954
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
  type: MusicAlbum
  date published: 2025-09-10
isrc code: QZWFP2317451
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T13:40:39+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd8e85fa5576b5a8f6f5053efaf7f96f6359e8a12986bd1a8381635e1d7638ac3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956560
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956560
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317451
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T23:28:02Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e85fa5576b5a8f6f5053efaf7f96f6359e8a12986bd1a8381635e1d7638ac3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFP2317451.
  date published: 2026-07-03T23:28:02Z
audio: Chiều Hạ Vàng - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 159.999
  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: 0.503
  additional property: Energy
    type: PropertyValue
    value: 0.469
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.005
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.448
  additional property: Liveness
    type: PropertyValue
    value: 0.345
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.423
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.775
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Chuyện Ba Mùa Mưa - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M33S
duration ms: 273659
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
  type: MusicAlbum
  date published: 2025-09-10
isrc code: QZWFP2317452
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T23:00:40+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe249f2b27378bc35614b71d533851897c2691e2e73acd1bb87f05a9b6c81de60
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958341
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958341
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317452
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-17T01:08:10Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe249f2b27378bc35614b71d533851897c2691e2e73acd1bb87f05a9b6c81de60. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZWFP2317452.
  date published: 2026-07-17T01:08:10Z
audio: Chuyện Ba Mùa Mưa - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 83.009
  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: 0.546
  additional property: Energy
    type: PropertyValue
    value: 0.477
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.003
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.292
  additional property: Liveness
    type: PropertyValue
    value: 0.047
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.555
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.136
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Chuyện Ba Người - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M39S
duration ms: 279261
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
  type: MusicAlbum
  date published: 2025-09-10
isrc code: QZWFP2317453
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T09:00:22+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x90b618d8fd67558b111a12b84d485eb1a3c47b57ca26706976bcdbd9bde967cb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956639
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956639
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317453
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T11:19:20Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b618d8fd67558b111a12b84d485eb1a3c47b57ca26706976bcdbd9bde967cb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFP2317453.
  date published: 2026-07-04T11:19:20Z
audio: Chuyện Ba Người - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 82.985
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.514
  additional property: Energy
    type: PropertyValue
    value: 0.433
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.019
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.939
  additional property: Liveness
    type: PropertyValue
    value: 0.068
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.553
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.836
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Chuyện Đêm Mưa - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M35S
duration ms: 275698
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
  type: MusicAlbum
  date published: 2025-09-10
isrc code: QZWFP2317454
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T12:19:24+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4d7cffb171bc4124b73a10d694492637c44dc8c3947e5533bd4bac183d660191
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958286
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958286
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317454
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-16T12:43:37Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7cffb171bc4124b73a10d694492637c44dc8c3947e5533bd4bac183d660191. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFP2317454.
  date published: 2026-07-16T12:43:37Z
audio: Chuyện Đêm Mưa - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 160.01
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.522
  additional property: Energy
    type: PropertyValue
    value: 0.483
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.008
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.322
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.439
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.384
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Đường Xưa Lối Cũ - Hòa Tấu Guitar
type: MusicRecording
duration: PT5M26S
duration ms: 326629
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
  type: MusicAlbum
  date published: 2025-09-10
isrc code: QZWFP2317455
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T08:58:42+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x68fafc77db1d7563dec6d11aa9d344f39b1fb8b8a83d414248c0d584c700b97c
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/QZWFP2317455
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T14:03:39Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fafc77db1d7563dec6d11aa9d344f39b1fb8b8a83d414248c0d584c700b97c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317455.
  date published: 2026-07-04T14:03:39Z
audio: Đường Xưa Lối Cũ - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 88.019
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.57
  additional property: Energy
    type: PropertyValue
    value: 0.517
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.014
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.859
  additional property: Liveness
    type: PropertyValue
    value: 0.119
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.495
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.916
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

Giã Từ - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M32S
duration ms: 272774
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
  type: MusicAlbum
  date published: 2025-09-10
isrc code: QZWFP2317456
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T02:55:58+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3c754108a0e07bfd8686d5895c7dfdd87fc7d991d4ee4108eae7d7738dbbb5de
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/QZWFP2317456
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T14:03:39Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c754108a0e07bfd8686d5895c7dfdd87fc7d991d4ee4108eae7d7738dbbb5de. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317456.
  date published: 2026-07-04T14:03:39Z
audio: Giã Từ - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 80.977
  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: 0.522
  additional property: Energy
    type: PropertyValue
    value: 0.483
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.023
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.829
  additional property: Liveness
    type: PropertyValue
    value: 0.123
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.477
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.626
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Ai Nhớ Chăng Ai - Hòa Tấu Guitar
type: MusicRecording
duration: PT5M25S
duration ms: 325468
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà 2025 VOL 6
  type: MusicAlbum
  date published: 2025-09-10
isrc code: QZWFP2317450
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T00:26:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf5305fb01f83405679b4ff09fbcb2b85e6c40f08dc71e2092fc733966c1141eb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958474
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958474
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2317450
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T00:59:09Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5305fb01f83405679b4ff09fbcb2b85e6c40f08dc71e2092fc733966c1141eb. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFP2317450.
  date published: 2026-07-18T00:59:09Z
audio: Ai Nhớ Chăng Ai - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 161.95
  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: 0.543
  additional property: Energy
    type: PropertyValue
    value: 0.49
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.013
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.844
  additional property: Liveness
    type: PropertyValue
    value: 0.297
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.41
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.277
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Đắm Say Lòng Người
type: MusicAlbum
date published: 2025-10-10
track: Trăng Tàn Trên Hè Phố - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT6M0S
  duration ms: 360567
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Đắm Say Lòng Người
    type: MusicAlbum
    date published: 2025-10-10
  isrc code: QZHN42484250
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T13:44:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4c801fd8d67df1620afbb24f361690ca48a1ef0b3c0d955328339b6f830fb954
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958901
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958901
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484250
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T16:47:04Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c801fd8d67df1620afbb24f361690ca48a1ef0b3c0d955328339b6f830fb954. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:47:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484250.
    date published: 2026-07-20T16:47:04Z
  audio: Trăng Tàn Trên Hè Phố - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 80.99
    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: 0.561
    additional property: Energy
      type: PropertyValue
      value: 0.409
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.064
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.787
    additional property: Liveness
      type: PropertyValue
      value: 0.081
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.247
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.03
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Xin Em Đừng Khóc Vu Quy - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT4M39S
  duration ms: 279188
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Đắm Say Lòng Người
    type: MusicAlbum
    date published: 2025-10-10
  isrc code: QZHN42484253
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T12:03:26+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2d1d340b1862615be737fcc5575147bd7815b8a833a1b8c001df4f76d6209536
  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/QZHN42484253
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1d340b1862615be737fcc5575147bd7815b8a833a1b8c001df4f76d6209536. 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/QZHN42484253.
    date published: 2026-07-05T19:27:56Z
  audio: Xin Em Đừng Khóc Vu Quy - Hòa Tấu Guitar
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 161.889
    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: 0.512
    additional property: Energy
      type: PropertyValue
      value: 0.429
    additional property: Speechiness
      type: PropertyValue
      value: 0.027
    additional property: Acousticness
      type: PropertyValue
      value: 0.013
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.029
    additional property: Liveness
      type: PropertyValue
      value: 0.106
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.395
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.836
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Trả Lại Em - Hòa Tấu Guitar
  type: MusicRecording
  duration: PT5M2S
  duration ms: 302698
  explicit: false
  by artist: Nhạc Guitar Không Lời
  in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Đắm Say Lòng Người
    type: MusicAlbum
    date published: 2025-10-10
  isrc code: QZHN42484249
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T03:10:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x5a1abf679eaccd8f7489432d430926c5024462bf00db90eed0385590e14ee8cc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956889
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956889
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484249
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Trả Lại Em - Hòa Tấu Guitar
track: Chiều Cuối Tuần - Hòa Tấu Guitar

OTSTimestamp
type: PropertyValue
value: 2026-07-06T06:56:49Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1abf679eaccd8f7489432d430926c5024462bf00db90eed0385590e14ee8cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN42484249.
date published: 2026-07-06T06:56:49Z

Trả Lại Em - Hòa Tấu Guitar
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 80.967
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: 0.523
additional property: Energy
  type: PropertyValue
  value: 0.442
additional property: Speechiness
  type: PropertyValue
  value: 0.029
additional property: Acousticness
  type: PropertyValue
  value: 0.016
additional property: Instrumentalness
  type: PropertyValue
  value: 0.508
additional property: Liveness
  type: PropertyValue
  value: 0.047
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.253
additional property: Loudness (dB)
  type: PropertyValue
  value: -11.784
additional property: Key Name
  type: PropertyValue
  value: C#
additional property: Mode Name
  type: PropertyValue
  value: Minor

Chiều Cuối Tuần - Hòa Tấu Guitar
type: MusicRecording
duration: PT4M36S
duration ms: 276141
explicit: false
by artist: Nhạc Guitar Không Lời
in album: Nhạc Không Lời Hay Nhất | Hòa Tấu Rumba Hải Ngoại | Nhạc Guitar Phòng Trà Đắm Say Lòng Người
  type: MusicAlbum
  date published: 2025-10-10
isrc code: QZHN42484244
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T07:06:48+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3301a8184d712e267f386a969ba0891de5fcc7955ff126600ff8f8bacee250bb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957819
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957819
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42484244
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-13T07:53:33Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301a8184d712e267f386a969ba0891de5fcc7955ff126600ff8f8bacee250bb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN42484244.
  date published: 2026-07-13T07:53:33Z
audio: Chiều Cuối Tuần - Hòa Tấu Guitar
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 162.035
  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: 0.521
  additional property: Energy
    type: PropertyValue
    value: 0.442
  additional property: Speechiness
    type: PropertyValue
    value: 0.027
  additional property: Acousticness
    type: PropertyValue
    value: 0.007
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.292
  additional property: Liveness
    type: PropertyValue
    value: 0.045
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.345
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.106
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor