Who makes sure the Anti-Corruption Court isn’t corrupt? Is it courts all the way up?

I don’t think accountability on the international level has proven very effective in the past.[0] And I don’t think this would be any different. Especially because those member states cooperation would be determined by people who only stand to lose from being a part of it.

[0] https://en.m.wikipedia.org/wiki/United_Nations_Assistance_Mi...