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 0x6eb6d69aa2d66535cbaa47e5f7c051a566e57e83cbc89b26426d92b40c500960. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2582916e-d40e-4a77-b5d3-79f2175ba2cb.json and https://artists.proofprofile.net/proofs/artist/2582916e-d40e-4a77-b5d3-79f2175ba2cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
NOTE DI DONNE vol.2 - La musica di Isabella Leonarda tra innovazione e tradizione