The Mashriq (; ), also known as the Arab Mashriq (), sometimes spelled Mashreq or Mashrek, is the eastern part of the Arab world, as opposed to the Maghreb (western region), located in West Asia and e
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04202a8e1866464583debc7b8d863b57305278b6801ec083d3ccf1bc5bc4f2b9. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15e7a23a-e5fc-4ba6-bd63-ab95d5496b11.json and https://artists.proofprofile.net/proofs/artist/15e7a23a-e5fc-4ba6-bd63-ab95d5496b11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).