i want to know which ip is shown to the website i visit

I used to use Hide My Ass VPN Client on Virtual Machine and all works good, until i needed to run VPN only for specific websites/IPs only, so i downloaded OpenVPN 2.4 and made Batch Scripts to connect and disconnect from VPN Server automatically,

Now the problem is that i want to make sure that the target website i visit is really affected with the VPN, i tested this with ip website and shows the VPN IP but in the another website i cant know what the website sees.

TIA