Dahab (, ) is a small town on the southeast coast of the Sinai Peninsula in Egypt, approximately northeast of Sharm el-Sheikh. Dahab can be divided into three major parts. Masbat, which includes the
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 0x535a20ba15d35c076ecd109c39e2af0ebc9f90a76d4ee6558ce6d50cd91170af. 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/5377069f-4841-4d3a-8447-da6dd3ff1fbe.json and https://artists.proofprofile.net/proofs/artist/5377069f-4841-4d3a-8447-da6dd3ff1fbe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).