Yeah, making many copies makes sense. But if you're doing that, it's way easier to just make many copies of the original message. In other words, just publish i

Yeah, making many copies makes sense. But if you're doing that, it's way easier to just make many copies of the original message. In other words, just publish it as a book and be done with it. Broadcasting the hash would make sense if the message should stay secret for some time. Although 500 years is rather a long time for a zero-knowledge proof.