Hoàng An
type: MusicGroup
popularity: 8
followers: 49
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x53f98bb5f7786c033353a0d12b24c462ecf6501e11d66057656c038e141227bf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/30c7932f-0694-479c-acc0-eec8074793b3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/30c7932f-0694-479c-acc0-eec8074793b3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/30c7932f-0694-479c-acc0-eec8074793b3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x53f98bb5f7786c033353a0d12b24c462ecf6501e11d66057656c038e141227bf","name":"Hoàng An","registered_at":"2026-06-16T06:50:44Z","symbol":"NIM0971478","token_address":"0xe8d4c3abe9da8944ab44d46fc0b809f11818008a","type":"artist","uuid":"30c7932f-0694-479c-acc0-eec8074793b3"}
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 0x53f98bb5f7786c033353a0d12b24c462ecf6501e11d66057656c038e141227bf. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30c7932f-0694-479c-acc0-eec8074793b3.json and https://artists.proofprofile.net/proofs/artist/30c7932f-0694-479c-acc0-eec8074793b3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x53f98bb5f7786c033353a0d12b24c462ecf6501e11d66057656c038e141227bf","name":"Hoàng An","registered_at":"2026-06-16T06:50:44Z","symbol":"NIM0971478","token_address":"0xe8d4c3abe9da8944ab44d46fc0b809f11818008a","type":"artist","uuid":"30c7932f-0694-479c-acc0-eec8074793b3"}
album: Sài Gòn Đêm Nay Còn Mưa Không?
  type: MusicAlbum
  date published: 2020-10-29