That's the problem, accurate visitor tracking wasn't on the web design goals.
But if you want an independent track to verify your JS report, the server logs have almost an almost completely disjunct set of problems.
https://developers.google.com/analytics/devguides/collection...
Did you write your own scripts to use your proxy URLs with the same API?
Besides, I was talking about my server directly sending data to Google Analytics without JavaScript on the client side. GA has strong adherence to GDPR so there's no legal or privacy issues I can see with that.
This assumes you self-host analytics.js and proxy GA API requests through your domain without changing path/query. If you manage to reverse engineer analytics.js and change the path/query AND proxy through your own domain, then this likely wouldn't be detected. But there's a chance that Google will make changes to analytics.js that aren't compatible with your reverse engineering it, and your setup breaks.