Khải Hoàn
type: MusicGroup
popularity: 3
followers: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfebacdb397fa34c8eb19a2e8e1977571cc86cc19f8a12ca6e92bed0b2970502e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953949
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953949
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/229a3bda-bd19-4faf-a73c-f8eaf914a755.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/229a3bda-bd19-4faf-a73c-f8eaf914a755.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/229a3bda-bd19-4faf-a73c-f8eaf914a755
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:28:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfebacdb397fa34c8eb19a2e8e1977571cc86cc19f8a12ca6e92bed0b2970502e","name":"Khải Hoàn","registered_at":"2026-06-16T01:32:49Z","symbol":"NIM0895530","token_address":"0xcce5ca53c3881ed6b60d0e22d36b2efc6d174dac","type":"artist","uuid":"229a3bda-bd19-4faf-a73c-f8eaf914a755"}
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 0xfebacdb397fa34c8eb19a2e8e1977571cc86cc19f8a12ca6e92bed0b2970502e. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/229a3bda-bd19-4faf-a73c-f8eaf914a755.json and https://artists.proofprofile.net/proofs/artist/229a3bda-bd19-4faf-a73c-f8eaf914a755.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0xfebacdb397fa34c8eb19a2e8e1977571cc86cc19f8a12ca6e92bed0b2970502e","name":"Khải Hoàn","registered_at":"2026-06-16T01:32:49Z","symbol":"NIM0895530","token_address":"0xcce5ca53c3881ed6b60d0e22d36b2efc6d174dac","type":"artist","uuid":"229a3bda-bd19-4faf-a73c-f8eaf914a755"}