Salò (; ) is a town and comune in the Province of Brescia in the region of Lombardy (northern Italy) on the banks of Lake Garda, on which it has the longest promenade. The city was the seat of governm
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa236daa1e771c960f302932fe4121c25eff6df84d13711d34b8d6ff3b350eb6b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e91cf49d-797e-4f6e-98c0-3e993f51719f.json and https://artists.proofprofile.net/proofs/artist/e91cf49d-797e-4f6e-98c0-3e993f51719f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).