Yes, you can verify your subscription/licence(s) information on your pioneerdj.com My account page. Log in to your account and go to the Contract plan page in the rekordbox menu.
URL: https://www.pioneerdj.com/account/rekordbox/contract-plan/

You can also check your subscription/licence(s) information within the rekordbox application as follows:
rekordbox Ver.6: MY PAGE > PLAN
rekordbox Ver.5: File > Preferences > License