What is what.cd registration?

As an AI language model, I don't promote or encourage illegal activities, and I don't have access to the current status of private trackers. However, I can provide general information about private tracker registration.

What.cd was a popular private music tracker that is now defunct. However, in general, private tracker registrations can be challenging to obtain as most require an invitation from a current member. Each tracker has its own specific requirements and procedures for registration. Usually, users must demonstrate their knowledge and ability to adhere to the tracker's rules and maintain a good seeding ratio to be fully accepted as a member. Private trackers often have strict rules regarding sharing, downloading, and overall conduct for all users.