What URL does Poweramp use to check verification?

[VirusHunter]

So Poweramp has had trouble verifying my purchase. I found the problem, an ad blocker I was using for my phone was blocking whatever url Poweramp uses to check the verification (no doubt related to google.) Is there any chance someone can tell me the url Poweramp uses to check license verification so I can add it to my ad blocker's whitelist? Thanks in advance.