Jeffrey Chang
type: MusicGroup
popularity: 4
followers: 1724
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa30c93b7a0c75ec0f62eef4c505959fd0f7812de3e257bec8f644e8fb3491396
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6003bb1b-9ab7-4d21-aaf5-72eeb1e2e1f5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6003bb1b-9ab7-4d21-aaf5-72eeb1e2e1f5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6003bb1b-9ab7-4d21-aaf5-72eeb1e2e1f5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa30c93b7a0c75ec0f62eef4c505959fd0f7812de3e257bec8f644e8fb3491396","name":"Jeffrey Chang","registered_at":"2026-06-16T23:08:13Z","symbol":"NIM1204706","token_address":"0x116ea2dc9c77a12905113386b4dafaa0a9532d9a","type":"artist","uuid":"6003bb1b-9ab7-4d21-aaf5-72eeb1e2e1f5"}
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 0xa30c93b7a0c75ec0f62eef4c505959fd0f7812de3e257bec8f644e8fb3491396. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6003bb1b-9ab7-4d21-aaf5-72eeb1e2e1f5.json and https://artists.proofprofile.net/proofs/artist/6003bb1b-9ab7-4d21-aaf5-72eeb1e2e1f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xa30c93b7a0c75ec0f62eef4c505959fd0f7812de3e257bec8f644e8fb3491396","name":"Jeffrey Chang","registered_at":"2026-06-16T23:08:13Z","symbol":"NIM1204706","token_address":"0x116ea2dc9c77a12905113386b4dafaa0a9532d9a","type":"artist","uuid":"6003bb1b-9ab7-4d21-aaf5-72eeb1e2e1f5"}
album: I Take It Back
  type: MusicAlbum
  date published: 2021-01-15
album: Forgive Me
  type: MusicAlbum
  date published: 2021-02-12
album: Self-Conscious
  type: MusicAlbum
  date published: 2021-04-23
album: Paradise
  type: MusicAlbum
  date published: 2024-02-02
album: Self-Conscious
  type: MusicAlbum
  date published: 2024-03-15
album: Wolves
  type: MusicAlbum
  date published: 2024-05-31
album: Evelyn
  type: MusicAlbum
  date published: 2024-10-02
  track: Evelyn
    type: MusicRecording
    duration: PT2M47S
    duration ms: 167485
    explicit: false
    by artist: Jeffrey Chang
    in album: Evelyn
      type: MusicAlbum
      date published: 2024-10-02
    isrc code: USL4R2437166
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T15:27:42+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf445973d6323b433d3489c67e165aa65209a5f576b39c318ab3526179e7f35d6
    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/USL4R2437166
    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 0xf445973d6323b433d3489c67e165aa65209a5f576b39c318ab3526179e7f35d6. 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/USL4R2437166.
      date published: 2026-07-18T19:27:02Z
    audio: Evelyn
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.008
      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: 0.659
      additional property: Energy
        type: PropertyValue
        value: 0.766
      additional property: Speechiness
        type: PropertyValue
        value: 0.067
      additional property: Acousticness
        type: PropertyValue
        value: 0.036
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.114
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.759
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.839
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor