David Patiño Calvo (born 6 September 1967) is a Mexican former professional footballer and manager. He obtained a total number of 28 caps for the Selección de fútbol de México (Mexico national team) b
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 0x1f3c6e6b2f77b9c17a11fffa3c85d8cb194016eeeb790052adf3e44cd0199c8b. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/018e5217-2093-4be0-adea-d6d7b33d891c.json and https://artists.proofprofile.net/proofs/artist/018e5217-2093-4be0-adea-d6d7b33d891c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).