Choi Yong Chang
type: MusicGroup
popularity: 7
followers: 8
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3246684e963f33fb2588e001f22d2797670dc9a043e1edcfcaeaade16d33e8f8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954131
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954131
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7d62ce35-7ed0-4dd4-a4bf-39a4dcd1d2c2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7d62ce35-7ed0-4dd4-a4bf-39a4dcd1d2c2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7d62ce35-7ed0-4dd4-a4bf-39a4dcd1d2c2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:19:19Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3246684e963f33fb2588e001f22d2797670dc9a043e1edcfcaeaade16d33e8f8","name":"Choi Yong Chang","registered_at":"2026-06-17T09:18:17Z","symbol":"NIM1350231","token_address":"0x745ddc768038aff646bd28d0a8f0968b44dab42e","type":"artist","uuid":"7d62ce35-7ed0-4dd4-a4bf-39a4dcd1d2c2"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3246684e963f33fb2588e001f22d2797670dc9a043e1edcfcaeaade16d33e8f8. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d62ce35-7ed0-4dd4-a4bf-39a4dcd1d2c2.json and https://artists.proofprofile.net/proofs/artist/7d62ce35-7ed0-4dd4-a4bf-39a4dcd1d2c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0x3246684e963f33fb2588e001f22d2797670dc9a043e1edcfcaeaade16d33e8f8","name":"Choi Yong Chang","registered_at":"2026-06-17T09:18:17Z","symbol":"NIM1350231","token_address":"0x745ddc768038aff646bd28d0a8f0968b44dab42e","type":"artist","uuid":"7d62ce35-7ed0-4dd4-a4bf-39a4dcd1d2c2"}
track: 絕對美麗
  type: MusicRecording
  duration: PT3M28S
  duration ms: 208293
  explicit: false
  by artist: Aaron Kwok
  by artist: Choi Yong Chang
  by artist: Simon'DumchiDumchi' Li
  by artist: Yang Soung Taek
  in album: 郭富城愛。情大舞台
    type: MusicAlbum
    date published: 2002-10-01
  popularity: 9
  isrc code: HKI490102504
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-24T14:46:27+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7186a26c43beb7d858c524f417df523a52a723be31f7ca6633137a6ded011244
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI490102504
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7186a26c43beb7d858c524f417df523a52a723be31f7ca6633137a6ded011244. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI490102504.
    date published: 2026-07-02T03:55:08Z
  audio: 絕對美麗
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 147.22
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.725
    additional property: Energy
      type: PropertyValue
      value: 0.862
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.07
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.243
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.896
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.307
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: 絕對美麗 - Guo Yu Ban
  type: MusicRecording
  duration: PT3M28S
  duration ms: 208306
  explicit: false
  by artist: Aaron Kwok
  by artist: Choi Yong Chang
  by artist: Simon'DumchiDumchi' Li@Avon Studio & Novasonic
  by artist: assisted by Yang Soung Taek@Ivy Digital Studio
  in album: 郭富城愛。情大舞台
    type: MusicAlbum
    date published: 2002-10-01
  popularity: 3
  isrc code: HKI490102511
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-29T22:04:40+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x97e40525115d3440a30439270e277223da1ca19c0eddb7b21f33c4c31573d672
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960157
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960157
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI490102511
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-29T22:12:10Z
  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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e40525115d3440a30439270e277223da1ca19c0eddb7b21f33c4c31573d672. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/HKI490102511.
    date published: 2026-07-29T22:12:10Z
  audio: 絕對美麗 - Guo Yu Ban
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 147.227
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.701
    additional property: Energy
      type: PropertyValue
      value: 0.857
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.045
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.159
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Valence (Positivity)
type: PropertyValue
value: 0.938

Loudness (dB)
type: PropertyValue
value: -11.14

Key Name
type: PropertyValue
value: F

Mode Name
type: PropertyValue
value: Minor