Esparza is a Basque surname. Notable people with the surname include: Victor Manuel Esparza (born 1986), Mexican-American Electrical Engineer, investor, and entrepreneur Antonio Esparza (born 1962),
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 0x4f7e63985584e4160449924fb3682a19fb77c8121498b874a96595cb497a1ff8. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/091814df-d3b3-4727-9f32-d1499e64d1fa.json and https://artists.proofprofile.net/proofs/artist/091814df-d3b3-4727-9f32-d1499e64d1fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).