Gustavo Edgardo Cordera (born September 15, 1961 in Avellaneda, Buenos Aires) is an Argentine rock musician, best known as the ex frontman of the band Bersuit Vergarabat. Biography Cordera's musica
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 0x18239bf3c63ecb0baaec920946fb6a5c2f41dd8be49631b2ba3f12ff75cd7f55. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edcc5988-2b32-4563-98fd-11bd05f65972.json and https://artists.proofprofile.net/proofs/artist/edcc5988-2b32-4563-98fd-11bd05f65972.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).