Marco Sfogli (born April 4, 1980) is an Italian heavy metal and rock guitarist. He has played guitar with James LaBrie, PFM and Icefish. Biography Born in 1980, Sfogli's first attempt with music ca
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 0x365621689afc907279eaac428bd44f09ad6b5ae66e968d5bf747d65db0084b14. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fd661d8-5bd1-42fc-bc6e-dee5f932f5b8.json and https://artists.proofprofile.net/proofs/artist/6fd661d8-5bd1-42fc-bc6e-dee5f932f5b8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.