Flavio
type: MusicGroup
description: thumb|upright=1.1|George Frideric Handel Flavio, re de' Longobardi ("Flavio, King of the Lombards", HWV 16) is an opera seria in three acts by George Frideric Handel. The Italian-language libretto was
popularity: 6
followers: 308
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x01b62915b78777f59195ded0d8d815417f0a3a1459d1e267e97cf4dab1282fc2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953947
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953947
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/233da8bb-dd80-4a2a-8c64-597df52600e0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/233da8bb-dd80-4a2a-8c64-597df52600e0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/233da8bb-dd80-4a2a-8c64-597df52600e0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:14:26Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b62915b78777f59195ded0d8d815417f0a3a1459d1e267e97cf4dab1282fc2. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/233da8bb-dd80-4a2a-8c64-597df52600e0.json and https://artists.proofprofile.net/proofs/artist/233da8bb-dd80-4a2a-8c64-597df52600e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:14:26Z
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