Jorge Cardona Marquez (born 2 November 1987 in Zaragoza) is a class 9 table tennis player from Spain. Personal In 2013, he was awarded the bronze Real Orden al Mérito Deportivo, at a ceremony at th
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 0xed8aa93bca05537b2ad99dacc83a80eb66ce2ff4afd3481ea61528bef89873aa. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abe82168-597b-4101-af5b-dbc4dc3b09dd.json and https://artists.proofprofile.net/proofs/artist/abe82168-597b-4101-af5b-dbc4dc3b09dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).