Duy Khánh & Hương Lan
type: MusicGroup
genre: bolero
genre: vietnamese bolero
popularity: 6
followers: 1547
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x44a1aaa3dd9b8ca04599fe7d82faff7299d737b644174f0f20ffe7a10c71b0b2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c21757d-8b4d-48e3-bcff-40e5d2cad9c5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c21757d-8b4d-48e3-bcff-40e5d2cad9c5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9c21757d-8b4d-48e3-bcff-40e5d2cad9c5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x44a1aaa3dd9b8ca04599fe7d82faff7299d737b644174f0f20ffe7a10c71b0b2","name":"Duy Khánh & Hương Lan","registered_at":"2026-06-20T03:40:46Z","symbol":"NIM1504525","token_address":"0xebba360a06a3b53f6740d7536dee3a3f8b510013","type":"artist","uuid":"9c21757d-8b4d-48e3-bcff-40e5d2cad9c5"}
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 0x44a1aaa3dd9b8ca04599fe7d82faff7299d737b644174f0f20ffe7a10c71b0b2. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c21757d-8b4d-48e3-bcff-40e5d2cad9c5.json and https://artists.proofprofile.net/proofs/artist/9c21757d-8b4d-48e3-bcff-40e5d2cad9c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T05:07:36Z
  text: {"copyright_id":"0x44a1aaa3dd9b8ca04599fe7d82faff7299d737b644174f0f20ffe7a10c71b0b2","name":"Duy Khánh & Hương Lan","registered_at":"2026-06-20T03:40:46Z","symbol":"NIM1504525","token_address":"0xebba360a06a3b53f6740d7536dee3a3f8b510013","type":"artist","uuid":"9c21757d-8b4d-48e3-bcff-40e5d2cad9c5"}
album: Que Huong Ta
  type: MusicAlbum
  date published: 1998
  track: Ruoc Tinh Ve Voi Que Huong
    type: MusicRecording
    duration: PT5M0S
    duration ms: 300810
    explicit: false
    by artist: Duy Khánh & Hương Lan
    in album: Que Huong Ta
      type: MusicAlbum
      date published: 1998
    genre: bolero
    genre: vietnamese bolero
    isrc code: USJ3V1198302
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T11:30:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb9d9a2e033c2217c0f7165fb9c1efadff164b4320d905eb5b687dd054e1c0363
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958544
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958544
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V1198302
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T12:14:37Z
    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 0xb9d9a2e033c2217c0f7165fb9c1efadff164b4320d905eb5b687dd054e1c0363. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USJ3V1198302.
      date published: 2026-07-18T12:14:37Z
    audio: Ruoc Tinh Ve Voi Que Huong
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 109.743
      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: 0.74
      additional property: Energy
        type: PropertyValue
        value: 0.357
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.522
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.228
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.658
      additional property: Loudness (dB)
        type: PropertyValue
        value: -16.548
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Mua Tren Pho Hue
  type: MusicAlbum
  date published: 1999
  track: Con Duong Mang Ten Em
    type: MusicRecording
    duration: PT4M24S
    duration ms: 264855
    explicit: false
    by artist: Duy Khánh & Hương Lan
    in album: Mua Tren Pho Hue
      type: MusicAlbum
      date published: 1999
    genre: bolero
    genre: vietnamese bolero
    isrc code: USJ3V1106878
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T17:13:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x305aeb8fffaf1885d7446b1e5ef52ea45a3d52d5b7db5ce587da98fcc2b5974f
    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/USJ3V1106878
    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 0x305aeb8fffaf1885d7446b1e5ef52ea45a3d52d5b7db5ce587da98fcc2b5974f. 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/USJ3V1106878.
      date published: 2026-07-03T23:28:02Z
    audio: Con Duong Mang Ten Em
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 76.022
      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: 0.509
      additional property: Energy
        type: PropertyValue
        value: 0.329
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.724
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Liveness
type: PropertyValue
value: 0.093

Valence (Positivity)
type: PropertyValue
value: 0.327

Loudness (dB)
type: PropertyValue
value: -13.888

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Minor