The problem
A gold assay card is a piece of paper, and paper gets forged. A lab owner has no way to prove a card really came from them, or to revoke one that was cancelled.
What we built
Every card carries a public QR verification link: anyone scanning it sees the status immediately — valid, revoked, or not found — without entering the system. Tenant isolation is covered by a dedicated test.
The result
Under real load testing the platform sustained 1,880 requests per second, covered by 94 automated tests.
