How to block the license of your program in case of violations?

Question

Software design

Hello.
I am writing a server program (c++) that will run on linux (possibly in the future on windows as well). The license will be bound to a domain name + two ip addresses. For example, Domain: test.ru, ip1: 1.1.1.1, ip2: 1.1.1.2.
The program runs on two different servers and connects to each other, which makes it possible to check the current ip addresses during the initial launch. In case of a discrepancy with the issued ip addresses in the license, the program ends with a message in the log.
But what if, when issuing a license, the domain to which the license was issued was checked for legality, and after some time illegal content was found on the site.
How can I block a license? What are the general solutions?

Solution: periodically make a request to a separate server, which will issue an answer - whether the license is blocked (with the reason for blocking) or not.
Cons: if the client blocks the ip/domain to which the verification request is made, then the program will never be blocked.

Thank you.