Leandro Zanardi
type: MusicGroup
genre: lullaby
popularity: 4
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6a90d9c3a13c80edeb4c494ad2557963bfc1316279dfe63594714de4cf332de2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953885
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953885
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c226904-d731-46d0-bf8d-59b8b8e6988f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c226904-d731-46d0-bf8d-59b8b8e6988f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0c226904-d731-46d0-bf8d-59b8b8e6988f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T04:12:47Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6a90d9c3a13c80edeb4c494ad2557963bfc1316279dfe63594714de4cf332de2","name":"Leandro Zanardi","registered_at":"2026-06-15T17:37:47Z","symbol":"NIM0782188","token_address":"0x2cfa133c07f6dda8275269e68da219cc75b4518a","type":"artist","uuid":"0c226904-d731-46d0-bf8d-59b8b8e6988f"}
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 0x6a90d9c3a13c80edeb4c494ad2557963bfc1316279dfe63594714de4cf332de2. Chain 2 (Bitcoin): anchored in block 953886 (2026-06-16T04:37:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c226904-d731-46d0-bf8d-59b8b8e6988f.json and https://artists.proofprofile.net/proofs/artist/0c226904-d731-46d0-bf8d-59b8b8e6988f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T04:37:45Z
  text: {"copyright_id":"0x6a90d9c3a13c80edeb4c494ad2557963bfc1316279dfe63594714de4cf332de2","name":"Leandro Zanardi","registered_at":"2026-06-15T17:37:47Z","symbol":"NIM0782188","token_address":"0x2cfa133c07f6dda8275269e68da219cc75b4518a","type":"artist","uuid":"0c226904-d731-46d0-bf8d-59b8b8e6988f"}