José "Cheo" Hernández (born 1894) was a Cuban professional baseball pitcher and outfielder in the Negro leagues and the Cuban League, as well as spending some time in minor league baseball. His career
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 0xcdee8c5566bc41a7ced94c4accb5e6db96b0a88fa27ce44fcc648e77ecd2d2b9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/901baa94-37b3-478b-abec-af475648f984.json and https://artists.proofprofile.net/proofs/artist/901baa94-37b3-478b-abec-af475648f984.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).