I'm not sure what that would mean. How do you keep the UUID secret in a way that you can use for verification?
BTW, thanks for engaging in this discussion. It's important and it's helping me rethink through all of this.
Another option is making a fake ballot. The local newspaper used to helpfully publish their suggestion of how a devout left wing progressive would fill out their ballot. They're currently the establishment, so they're likely to be the largest problem, and its solved right there.