Cuneiform is a logo-syllabic writing system that was used to write several languages of the ancient Near East. The script was in active use from the early Bronze Age until the 1st century BC. Cuneifor
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 0x74854ea5f70e9c134bb7cd928dcc9a2fc524071ca32bea50dd15e95f4b9ffc7a. 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/6ec6149e-74ab-4cbd-b33f-dfabe7fafbd4.json and https://artists.proofprofile.net/proofs/artist/6ec6149e-74ab-4cbd-b33f-dfabe7fafbd4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).