Ballester is a surname. Notable people with the surname include: Antonio Ballester (died 1387), Archbishop of Athens, appointed by Pope Urban VI Arturo Ballester Marco (1892–1981), Spanish artist and
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 0xd7829dd486f5214bc565f7fcfaca6d41c839f46e5900125c192ec7cc8655d208. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6252421-3a1c-492d-8e50-44f5bd01534c.json and https://artists.proofprofile.net/proofs/artist/b6252421-3a1c-492d-8e50-44f5bd01534c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).