Hoàng Nhật Minh
type: MusicGroup
genre: v-pop
popularity: 13
followers: 675
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3ce4e2d89d4bc2b68462f9cd023a9a9f590948904eaeb4b1874b9b33215e837c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953778
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953778
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ae7662d8-0659-4015-8801-4044bef2b65a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ae7662d8-0659-4015-8801-4044bef2b65a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ae7662d8-0659-4015-8801-4044bef2b65a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:57:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3ce4e2d89d4bc2b68462f9cd023a9a9f590948904eaeb4b1874b9b33215e837c","name":"Hoàng Nhật Minh","registered_at":"2026-06-14T22:46:12Z","symbol":"NIM0600365","token_address":"0x3e15cf97dfd8a2df17d558fa944f055c3712143c","type":"artist","uuid":"ae7662d8-0659-4015-8801-4044bef2b65a"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce4e2d89d4bc2b68462f9cd023a9a9f590948904eaeb4b1874b9b33215e837c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae7662d8-0659-4015-8801-4044bef2b65a.json and https://artists.proofprofile.net/proofs/artist/ae7662d8-0659-4015-8801-4044bef2b65a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:57:35Z
  text: {"copyright_id":"0x3ce4e2d89d4bc2b68462f9cd023a9a9f590948904eaeb4b1874b9b33215e837c","name":"Hoàng Nhật Minh","registered_at":"2026-06-14T22:46:12Z","symbol":"NIM0600365","token_address":"0x3e15cf97dfd8a2df17d558fa944f055c3712143c","type":"artist","uuid":"ae7662d8-0659-4015-8801-4044bef2b65a"}
album: Hoàng Nhật Minh Acoustic Vol1
  type: MusicAlbum
  date published: 2018-03-01
album: Như Chưa Bắt Đầu
  type: MusicAlbum
  date published: 2018-03-01
album: Hoàng Nhật Minh Acoustic., Vol. 1
  type: MusicAlbum
  date published: 2018-07-31
album: Như Chưa Bắt Đầu
  type: MusicAlbum
  date published: 2018-07-31
album: Ta Đã Đánh Mất
  type: MusicAlbum
  date published: 2020-03-03
album: Phút Luyến Lưu
  type: MusicAlbum
  date published: 2020-08-04
album: Thấu Tâm Nhau
  type: MusicAlbum
  date published: 2020-08-11
album: Hàn Lộ
  type: MusicAlbum
  date published: 2022-09-07
album: Acoustic Nhạc Hoa Lời Việt (New)
  type: MusicAlbum
  date published: 2022-10-14
album: Mình Còn Cần Nhau
  type: MusicAlbum
  date published: 2023-07-30
album: Cỏ Hoang Phủ Lối
  type: MusicAlbum
  date published: 2023-10-20
album: Dòng Sông Không Trở Lại
  type: MusicAlbum
  date published: 2023-10-20
album: Quên Đi Cuộc Tình
  type: MusicAlbum
  date published: 2023-10-20
album: Xóm Đêm
  type: MusicAlbum
  date published: 2023-10-20
album: Cánh Bướm Vườn Xuân (Instrumental)
  type: MusicAlbum
  date published: 2023-10-20
album: Lời Hứa Xuân
  type: MusicAlbum
  date published: 2023-10-20
album: Vô Tình
  type: MusicAlbum
  date published: 2023-10-20
album: Tình Xưa Nghĩa Cũ 2
  type: MusicAlbum
  date published: 2023-10-20
  track: Tình Xưa Nghĩa Cũ 2
    type: MusicRecording
    duration: PT3M45S
    duration ms: 225672
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    by artist: Hoàng Nhật Minh
    in album: Tình Xưa Nghĩa Cũ 2
      type: MusicAlbum
      date published: 2023-10-20
    genre: v-pop
    isrc code: QMFME2379973
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
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      type: PropertyValue
      value: 2026-07-17T10:14:42+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958397
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2379973
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T10:29:45Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37746283d32be7b48962b67f8945a704c13d8f98f4dc2033f661426dd9c5062. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2379973.
      date published: 2026-07-17T10:29:45Z
    audio: Tình Xưa Nghĩa Cũ 2
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 79.847
      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: 0.685
      additional property: Energy
        type: PropertyValue
        value: 0.256
      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.926
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.078
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.502
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.787
      additional property: Key Name
        type: PropertyValue
        value: F
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        type: PropertyValue
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album: Ngày Tết Quê Em
  type: MusicAlbum
  date published: 2023-10-20
album: Như Chưa Bắt Đầu
  type: MusicAlbum
  date published: 2023-10-20
album: Mưa Hồng
  type: MusicAlbum
  date published: 2023-10-20
album: Hai Mùa Noel
  type: MusicAlbum
  date published: 2023-10-20
album: Cánh Bướm Vườn Xuân
  type: MusicAlbum
  date published: 2023-10-20
album: Vì Anh Một Lần Nữa
  type: MusicAlbum
  date published: 2023-10-20
album: Khói Thuốc Đợi Chờ
  type: MusicAlbum
  date published: 2023-10-20
  track: Khói Thuốc Đợi Chờ
    type: MusicRecording
    duration: PT5M30S
    duration ms: 330084
    explicit: false
    by artist: Hoàng Nhật Minh
    in album: Khói Thuốc Đợi Chờ
    genre: v-pop
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    additional property: CopyrightStatus
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Khói Thuốc Đợi Chờ
album: Anh Vừa Yêu
album: Mừng Chúa Giáng Sinh
album: Nhớ Mùa Noel
album: Mãi Cho Em Mùa Xuân
album: Chúc Xuân
album: Đêm Nằm Mơ Phố
album: Nỗi Nhớ Mùa Đông
album: Niềm Đau Chôn Dấu
album: Mùa Đông Của Anh
album: Còn Yêu Em Mãi
album: Cánh Buồm Phiêu Du
album: Mơ Về Nơi Xa Lắm
album: Chúc Xuân (Instrumental)
album: Hà Nội Mùa Lá Rụng
album: Anh Còn Nợ Em
album: Ngày Hôm Qua
album: Đổi Thay (Remix)
album: Em Đi Rồi... Tình Ơi
album: Giấc Mơ Từ Hôm Qua (Hoàng Nhật Minh Cover)
album: Yêu Em Như Muôn Xuân Đầu

Hoàng Nhật Minh
type: MusicGroup

Khói Thuốc Đợi Chờ
type: MusicAlbum
date published: 2023-10-20

CopyrightID
type: PropertyValue

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-16T14:17:35+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0xdc6600b6d47ee1eddae27c6d74f06274773d800f4d2f8d6841df679c46d80cc6

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 958300

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958300

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2379722

OTSTimestamp
type: PropertyValue
value: 2026-07-16T16:14:30Z

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 0xdc6600b6d47ee1eddae27c6d74f06274773d800f4d2f8d6841df679c46d80cc6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMFME2379722.
date published: 2026-07-16T16:14:30Z

Khói Thuốc Đợi Chờ
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 131.756
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: 0.648
additional property: Energy
  type: PropertyValue
  value: 0.346
additional property: Speechiness
  type: PropertyValue
  value: 0.034
additional property: Acousticness
  type: PropertyValue
  value: 0.906
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.077
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.385
additional property: Loudness (dB)
  type: PropertyValue
  value: -6.725
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Minor

Anh Vừa Yêu
type: MusicAlbum
date published: 2023-10-20

Mừng Chúa Giáng Sinh
type: MusicAlbum
date published: 2023-10-20

Nhớ Mùa Noel
type: MusicAlbum
date published: 2023-10-20

Mãi Cho Em Mùa Xuân
type: MusicAlbum
date published: 2023-10-20

Chúc Xuân
type: MusicAlbum
date published: 2023-10-20

Đêm Nằm Mơ Phố
type: MusicAlbum
date published: 2023-10-20

Nỗi Nhớ Mùa Đông
type: MusicAlbum
date published: 2023-10-20
track: Nỗi Nhớ Mùa Đông
  type: MusicRecording
  duration: PT4M9S
  duration ms: 249940
  explicit: false
  by artist: Hoàng Nhật Minh
  in album: Nỗi Nhớ Mùa Đông
    type: MusicAlbum
    date published: 2023-10-20
  genre: v-pop
  isrc code: QMFME2379942
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T10:36:03+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8c2d27b6c230b91d40c178222561cb8d152ebafe9e024a3917d380ce61e31792
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956822
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956822
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2379942
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T18:48:28Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2d27b6c230b91d40c178222561cb8d152ebafe9e024a3917d380ce61e31792. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2379942.
    date published: 2026-07-05T18:48:28Z
  audio: Nỗi Nhớ Mùa Đông
    type: AudioObject
    additional property: Tempo (BPM)
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    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: 0.364
    additional property: Energy
      type: PropertyValue
      value: 0.242
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.856
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.111
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.197
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.135
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Niềm Đau Chôn Dấu
type: MusicAlbum
date published: 2023-10-20

Mùa Đông Của Anh
type: MusicAlbum
date published: 2023-10-20

Còn Yêu Em Mãi
type: MusicAlbum
date published: 2023-10-20

Cánh Buồm Phiêu Du
type: MusicAlbum
date published: 2023-10-20

Mơ Về Nơi Xa Lắm
type: MusicAlbum
date published: 2023-10-20
track: Mơ Về Nơi Xa Lắm
  type: MusicRecording
  duration: PT4M57S
  duration ms: 297039
  explicit: false
  by artist: Hoàng Nhật Minh
  in album: Mơ Về Nơi Xa Lắm
    type: MusicAlbum
    date published: 2023-10-20
  genre: v-pop
  isrc code: QMFME2379788
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T22:14:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
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  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/QMFME2379788
  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 0x247305ea05d8db43cc9e836f3d898e2c54ca1ad2303ecd545e2738796d8ffab2. 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/QMFME2379788.
    date published: 2026-07-04T11:19:20Z
  audio: Mơ Về Nơi Xa Lắm
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 120.056
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.566
    additional property: Energy
      type: PropertyValue
      value: 0.296
    additional property: Speechiness
      type: PropertyValue
      value: 0.03
    additional property: Acousticness
      type: PropertyValue
      value: 0.711
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.1
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.146
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.237
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
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Chúc Xuân (Instrumental)
type: MusicAlbum
date published: 2023-10-20

Hà Nội Mùa Lá Rụng
type: MusicAlbum
date published: 2023-10-20
track: Hà Nội Mùa Lá Rụng
  type: MusicRecording
  duration: PT4M15S
  duration ms: 255217
  explicit: false
  by artist: Hoàng Nhật Minh
  in album: Hà Nội Mùa Lá Rụng
    type: MusicAlbum
    date published: 2023-10-20
  genre: v-pop
  isrc code: QMFME2379711
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T21:03:41+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8caaa50436f9a2dc8e0a58010f14cb2afabf89f2f24270ab947fb7ca88d6e006
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956738
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2379711
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T04:47:21Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
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  audio: Hà Nội Mùa Lá Rụng
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