Ignacio "Nacho" Castillo Ameyugo (born 3 July 2000) is a Spanish professional footballer who plays as a midfielder for Primera Federación club Ourense. Club career Castillo was born in Miranda de Ebr
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 0x0e735087d34faa570f272c4a1a592cf14790d1b29a007f2043722f552e25db09. 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/0bf9338a-c43f-4731-9628-6343ee9de613.json and https://artists.proofprofile.net/proofs/artist/0bf9338a-c43f-4731-9628-6343ee9de613.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).