El Doctor is a series of mountain peaks north of the Pachuca Range of the Sierra Madre Oriental in the states of Querétaro and Hidalgo, Mexico. It includes an escarpment formed by the El Doctor Platfo
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 0xcb51b9db957a0445a3f70dff224b8a9a28c139aec22e7b124b45943ec14a44f0. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50fae779-0a1f-4bd9-9aa8-e2506712dfed.json and https://artists.proofprofile.net/proofs/artist/50fae779-0a1f-4bd9-9aa8-e2506712dfed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).