Larache () is a city in northwestern Morocco. It is on the Moroccan coast, where the Loukkos River meets the Atlantic Ocean. Larache is one of the most important cities of the Tanger-Tetouan-Al Hoceim
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 0xda4b827071213164c213f1ace9855b35c013cd05aebd4f6977f14f9096a7bbd7. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2652851-fa1a-46f4-b77a-f03e7c3171b0.json and https://artists.proofprofile.net/proofs/artist/f2652851-fa1a-46f4-b77a-f03e7c3171b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).