Mandara is an ethnic group and a language family in West Africa. It is also an alternative spelling of "mandarah", referring to a guest room in Middle Eastern buildings, especially in Egypt. Additi
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 0xb000b38c23ff7f784b6a9ceb839e0dffebdacf696fa687d99eb41c6a917b75aa. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c2ee308-165b-43c2-98fd-97d8934d4edb.json and https://artists.proofprofile.net/proofs/artist/3c2ee308-165b-43c2-98fd-97d8934d4edb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).