Roberto Orlando Bracone Macceialli (3 August 1943 – 19 December 2021), better known as Elio Roca was an Argentine singer. Roca was born in Presidencia Roque Sáenz Peña, Chaco Province, Argentina on
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a5c601f2c6db7eb612445014c3f3857e496e70087b1a412c5e0db2ca2f8b0. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4f4a4b0-2cb0-455f-a89e-b388aa2a4b03.json and https://artists.proofprofile.net/proofs/artist/a4f4a4b0-2cb0-455f-a89e-b388aa2a4b03.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).