Fabio Enrique Castro (born January 20, 1985), is a Dominican former professional baseball pitcher, who played in Major League Baseball (MLB) for the Texas Rangers and Philadelphia Phillies, from to .
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 0xd7601fab8f69a0163e54386caa72732bc7f7d74c139aadb9dc309844d268c84c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/868e2350-b1dc-49ea-8656-93f7d566389b.json and https://artists.proofprofile.net/proofs/artist/868e2350-b1dc-49ea-8656-93f7d566389b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).