César Batista (born 6 October 1928) is a Portuguese former sports shooter. He competed at the 1960 Summer Olympics and the 1972 Summer Olympics. References External links Category:1928 births Cat
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 0x05bfb75c815ddf9c76c3538e134408dc97c8d8d7c24de8a723004865e676facb. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/217786cd-4c50-4f7a-8788-ec7b1f142077.json and https://artists.proofprofile.net/proofs/artist/217786cd-4c50-4f7a-8788-ec7b1f142077.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).