Ruffo is a surname. Notable people with the surname include: Noble house of Ruffo di Calabria Fabrizio Ruffo (1744–1827), Italian cardinal Fulco Ruffo di Calabria (1884–1946), Italian World War I
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 0xd977738cb94aa57b5099a9d3a7e40cea290602a1fae0242c84d32f4b4cf1d48b. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4048915b-f14c-4f9f-98e7-04c624b81195.json and https://artists.proofprofile.net/proofs/artist/4048915b-f14c-4f9f-98e7-04c624b81195.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).