German & Carmen Inc. garcia2021LegacyBook:El German y Carmen Madrazo de Tetuan, Ciudad de Zamboanga by El Shelico 2022LibrodeAppelidos1890Madrazo is a Spanish surname and sometimes uses as "Maderazo"
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 0xc2a53b9e0006b10a9f48782519ab5452cd6982736eb30e8db1b71d7e7bfd0003. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f23d3da6-7cf8-4c86-9936-4fa54af6326f.json and https://artists.proofprofile.net/proofs/artist/f23d3da6-7cf8-4c86-9936-4fa54af6326f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).