OpenChainGraph Suite · ART-200 · IP Licensing & Tokenization

License Election Verifier

Verifies a certificate produced by the License Election Certifier (ART-199). Recomputes the SHA-256 terms_hash over the JCS-canonical election core and compares it against the stored hash. Returns verdict, binding_ok flag, recomputed hash, and per-check results.

Cryptographic Mandate JCS SHA-256 Verify Tamper Detection Selection Only

🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.

⚠ This tool verifies the cryptographic integrity of a license election certificate. A passing result confirms the certificate fields are internally consistent and have not been tampered with. It does not guarantee the license is valid, applicable, or legally enforceable. Not legal advice.

Presets:

Certificate JSON

Paste the certificate object from ART-199 output. Must contain certificate_version, asset_ref, licensor_did, license_election, and terms_hash.

Verification Result

Hash Comparison

Stored terms_hash:

Recomputed terms_hash:

Per-Check Results

Execution Hash (SHA-256)

Compliance Flags