Who verifies CSAM databases? Is there a way to verify the CSAM hashlist hasn't been tampered with and additional hashes inserted? Would it be ok to use this ap

Who verifies CSAM databases? Is there a way to verify the CSAM hashlist hasn't been tampered with and additional hashes inserted? Would it be ok to use this approach to stop "terrorism"? Are you ok with both Biden and Trump defining that list?