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An agent proposes an action. OmegaEngine scores it, decides, and seals the decision with a tamper-evident HMAC signature. This page is an educational, in-browser demo of that sealing step — evaluate a scenario below, then edit the sealed envelope and re-verify.
Want proof that doesn't require trusting us? Verify a real receipt offline — no trust in us required →
Choose a scenario
This page runs entirely in your browser with a public demo key, so you can tamper freely. In production the signature is computed with a server-held secret you never receive — an edited or forged decision can never produce a valid signature, and OmegaEngine is the verifier. Same canonical-JSON + HMAC-SHA256 mechanism as the live engine. For verification that requires no trust in us at all, OmegaEngine also issues Ed25519-signed attestations and OmegaReceipts that any third party can check offline with @omegaengine/verify against our published keys — verify one now.
Verify a live sample proof
npx -y @omegaengine/verify@latest sample --api=https://omegaengine.ai