Weinstein also sent people, threatening people, to try to intimidate the investigators. Even with all the information verified, there is still the threat of lawsuits, non-disclosure violations, and hired PI's threatening to ruin the lives of the reporters if they publish.
Ronan Farrow stumbled into it during his investigations of Weinstein. Its included in his book "Catch and Kill."
Proving it beyond that is pretty difficult, you know... because of said "Catch and Kill" methodology. Pecker doesn't spend billions to bury facts for nothing.
https://www.vox.com/policy-and-politics/2019/10/15/20915440/ronan-farrow-donald-trump-catch-and-kill
https://www.amazon.com/dp/0316486639/ref=cm_sw_em_r_mt_dp_U_DDd4Db0Y2K08M