Francisco Catalão Rebelo Andrade (born 6 August 1980 in Rio de Janeiro, Brazil) is a Portuguese sailor. He competed at the 2008 and 2012 Summer Olympics in the 49er class, finishing in 11th and 8th pl
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 0x07d75e5dc29a5a01784d88f66655bc545d9b391e4483c1f766381703f8f021ae. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cc1877c-b89e-4063-96c7-a53f66b9cee5.json and https://artists.proofprofile.net/proofs/artist/4cc1877c-b89e-4063-96c7-a53f66b9cee5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).