Well, presuming the groundwork was laid, you'd open the envelope, read some lie to a room full of people who knew it was a lie, and simultaneously you'd have someone cast the binding vote on the uncensored decision, and the signal would propagate and there in their pockets the people would have some kind of proof that they could consult to know who actually won. They'd go home, and with them they'd carry the news, and it would eventually reach anyone subscribed to that topic.

Honestly a room full of SciFi nerds would probably be the right crowd for a stunt like that. Good SciFi is a critique of the time it was written, censored SciFi loses that.

I mean, I'm not suggesting anyone should take risks like this. It's their values, their stakes, I'm just some guy who has no business meddling in politics on the other side of the world. I'm just saying that if somebody somewhere wanted to make a stand against authoritarians, they'd be better served with a toolkit for aggregate coordination in the face of a capable adversary than without. And if we want to help then making that tech would be a start.