Luis Marcano (September 29, 1831 – May 16, 1870) was a Dominican general of the pre-independence Cuban Army during the Ten Years' War. Biography Luis Jerónimo Marcano Álvarez was born in Baní, Domini
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 0x1b191eb60215f835b9a50eaf3fb7d7ffa8c0a7073753e140bc99297cfd67e165. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca79cd1f-01c5-45ea-ac7b-9e4f5bd171cd.json and https://artists.proofprofile.net/proofs/artist/ca79cd1f-01c5-45ea-ac7b-9e4f5bd171cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).