thumb|right|Ras el hanout in a bowl Ras el hanout or rass el hanout ( , ) literally « head of the grocery store », is a spice mix found in varying forms in Tunisia, Algeria, and Morocco. The name mean
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 0x59cb266f9d2b27206b170292ab437beabcf8fbde3c048c8641ece54787dc0201. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64697cea-8858-4707-ad5c-ac9e3821b64c.json and https://artists.proofprofile.net/proofs/artist/64697cea-8858-4707-ad5c-ac9e3821b64c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).