REX
type: MusicGroup
genre: chinese hip hop
genre: chinese r&b
genre: taiwanese pop
description: Rex or REX may refer to: Rex (title) (Latin: king, ruler, monarch), a royal title King of Rome (Latin: Rex Romae), chief magistrate of the Roman Kingdom Animals Dogs Rex (Ronald Reagan's dog) R
popularity: 19
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc15ffa8edb82c5eaafd941ea63bc1e42661786ca7aba5f763cf9f8b97264d421
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953674
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953674
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ca2cc88-0f9a-4c75-8aa8-076acdd81363.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ca2cc88-0f9a-4c75-8aa8-076acdd81363.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5ca2cc88-0f9a-4c75-8aa8-076acdd81363
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T19:07:16Z
additional property: OTSCanonicalRecord
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 0xc15ffa8edb82c5eaafd941ea63bc1e42661786ca7aba5f763cf9f8b97264d421. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ca2cc88-0f9a-4c75-8aa8-076acdd81363.json and https://artists.proofprofile.net/proofs/artist/5ca2cc88-0f9a-4c75-8aa8-076acdd81363.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T19:07:16Z
track: 二選一
  type: MusicRecording
  duration: PT3M22S
  duration ms: 202553
  explicit: false
  by artist: Karencici
  by artist: Quanzo
  by artist: REX
  in album: 大嘻哈時代2: ROLL CALL 街頭支援
    type: MusicAlbum
    date published: 2023-03-28
  genre: mandopop
  genre: chinese-hip-hop
  genre: chinese-indie
  genre: chinese-r-b
  genre: c-pop
  genre: taiwanese-pop
  genre: taiwanese-indie
  isrc code: TWJK12200261
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-06T06:15:18+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x686bc17f0e71a8a0f0c4a2098e446e8793496c71b9aee6bf96d2a4cb16fe268b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 953513
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/953513
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWJK12200261
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T12:47:07Z
  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 0x686bc17f0e71a8a0f0c4a2098e446e8793496c71b9aee6bf96d2a4cb16fe268b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWJK12200261.
    date published: 2026-06-13T12:47:07Z
  audio: 二選一
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 160.782
    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: 0.642
    additional property: Energy
      type: PropertyValue
      value: 0.858
    additional property: Speechiness
      type: PropertyValue
      value: 0.086
    additional property: Acousticness
      type: PropertyValue
      value: 0.183
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.404
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.676
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.033
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor