This badge recomputes the signature. It asserts what was signed, never a score or quality. Below is the badge twice: once with the real signed card (should say VERIFIED) and once with the body tampered (should say TAMPERED).
No hosted score. No phone-home of key material. The public key and kid are embedded in the badge itself, so it works fully offline.
{"sig_algo":"ed25519","sig_b64":"LJobtLeEyAuRNJvNeOWKYzZWm0T5CXREVjIjpmZU2HMxJZ7nr2oOvtX8td2FclbKem42L1WEeQUPwcpPWY5GCA==","body_sha256":"ea1949c93d70df5026a2f97e27b25021e9d4a4cad30f5342919ffbf7ea31caec","body":"{\"v\":1,\"k\":\"living-training-attestation\",\"t\":\"2026-08-24T18:01:15.882Z\",\"n\":15,\"p\":{\"subject\":\"council-os-grid\",\"composite\":0.602,\"axes\":{\"gov\":0.602,\"care\":0.602,\"swarm\":0.602,\"affect\":0.602,\"slot15\":0.602,\"human-vs-ai\":0.602,\"safety\":0.602,\"privacy\":0.602,\"transparency\":0.602,\"fairness\":0.602,\"accountability\":0.602,\"continuity\":0.602,\"efficiency\":0.602,\"creativity\":0.602,\"sovereignty\":0.602},\"source\":\"munder-difflin-harness\"}}"}