thumb|right|Basurto Building thumb|right|Av. Vicente Suárez looking east from Av. Michoacán and Calle Atlixco thumb|200px|Art Deco influence in the neighborhood thumb|right|Fountain at Plaza Popcatépe
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 0x0e3dc86da5479aa30a4edfd2420c2fa52fd1505ca7e6820af1413a9ba88e57c4. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8821592-a88a-434c-85f9-1db75004c839.json and https://artists.proofprofile.net/proofs/artist/a8821592-a88a-434c-85f9-1db75004c839.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).