Francisco Santiago (January 29, 1889 – September 28, 1947) was a Filipino musician, sometimes called The Father of Kundiman Art Song. Life Santiago was born in Santa Maria, Bulacan, Philippines, 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 0x53f5166077dec6f86098757ea9edcde6e273458dcc915cb36dc61ef844dca024. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d02e39a9-f72b-41a7-8000-58e6f0fd7eda.json and https://artists.proofprofile.net/proofs/artist/d02e39a9-f72b-41a7-8000-58e6f0fd7eda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).