upright=1|thumb|right|Test tubes containing solutions of pH 1–10 colored with an indicator In chemistry, pH ( or ; ) is a logarithmic scale used to specify the acidity or basicity of aqueous solutio
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 0x05b219874d5f0ce887abfebdc550b4646c22c06184aebfc56053238e06439c7f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90eaa277-2668-4162-a9aa-2527425d6523.json and https://artists.proofprofile.net/proofs/artist/90eaa277-2668-4162-a9aa-2527425d6523.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).