It allows you to show what key signed a record. It doesn’t tell you what person used that key, whether they were acting in good faith, or whether they had the right information. If you want to know any of those things you have to pay real auditors to check real world status, and at that point you’re going to ask why you need to pay so much more to use a slow database which requires always-on internet connectivity when you’d get the same value from a Yubikey or iPhone’s builtin cryptographic primitives.