[the_svd_doctor]

Depends of the claim. For the theoretical result, the evidence is the paper. (I have no clue whether it’s correct.) Nothing else is needed. For “RSA is broken”, it depends what broken means. If it would rely on a claim that is now provably false, it is indeed broken. If we are talking about the claim of breaking RSA in the real world, I agree with you. But it all depends on the claim.