Chu Hạ
type: MusicGroup
popularity: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x152a185ae32b185f517c4b36203ca7dfe471bcd18b79210a82c6d5f7a2ebc304
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bec47194-489c-45c1-aaa9-75665345a7f4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bec47194-489c-45c1-aaa9-75665345a7f4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bec47194-489c-45c1-aaa9-75665345a7f4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x152a185ae32b185f517c4b36203ca7dfe471bcd18b79210a82c6d5f7a2ebc304","name":"Chu Hạ","registered_at":"2026-06-20T18:46:29Z","symbol":"NIM1680779","token_address":"0x90177f85c21e923447eec434dd44af5ec93af334","type":"artist","uuid":"bec47194-489c-45c1-aaa9-75665345a7f4"}
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 0x152a185ae32b185f517c4b36203ca7dfe471bcd18b79210a82c6d5f7a2ebc304. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bec47194-489c-45c1-aaa9-75665345a7f4.json and https://artists.proofprofile.net/proofs/artist/bec47194-489c-45c1-aaa9-75665345a7f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x152a185ae32b185f517c4b36203ca7dfe471bcd18b79210a82c6d5f7a2ebc304","name":"Chu Hạ","registered_at":"2026-06-20T18:46:29Z","symbol":"NIM1680779","token_address":"0x90177f85c21e923447eec434dd44af5ec93af334","type":"artist","uuid":"bec47194-489c-45c1-aaa9-75665345a7f4"}