Fernando Lima (born May 7, 1975 in Buenos Aires, Argentina) is an Argentine vocalist, classical music singer and countertenor, who rose to prominence for providing vocals for Spanish-language pop song
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 0x9645905b00f731816aea8903024f21f3c636e5768d9d11cfdabd897e7b2f31a0. 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/50d5ff7a-f277-491e-ac39-69e4b62bc340.json and https://artists.proofprofile.net/proofs/artist/50d5ff7a-f277-491e-ac39-69e4b62bc340.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).