Merca (; ) is the capital city of the Lower Shebelle province of Somalia, a historic port city in the region. It is located approximately to the southwest of the nation's capital Mogadishu. Merca is
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 0xca60659985c5fab89fcf536267de800d7ab8712035248f464b69849a7e61f120. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6411190-4234-4f17-9ec7-37b992ced0ce.json and https://artists.proofprofile.net/proofs/artist/b6411190-4234-4f17-9ec7-37b992ced0ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).