Francesca Palumbo (born 10 February 1992) is an Italian fencer who won one gold medal at the 2015 Summer Universiade. She also won the bronze medal at 2019 European Fencing Championships. She comp
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506d1f8308172f0fbc2579d793e8cde5f3dee4af5c1c6eb41ac8f66a8b578775. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a15d54f-6907-40ec-984a-84458a7d1836.json and https://artists.proofprofile.net/proofs/artist/8a15d54f-6907-40ec-984a-84458a7d1836.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).