Macroscopic stuff can possibly be faked with special effects. Verifiable randomness would be best done with a public record. You could have multiple companies

Macroscopic stuff can possibly be faked with special effects. Verifiable randomness would be best done with a public record. You could have multiple companies provide numbers and hash them together so that all of them would have to collude to manipulate it. Like cloudflare's beacon thing. However lotteries are mostly just entertainment like any other gambling, and the balls are part of the show, so they would need some other spectacle.