You can enter your ISC2 member number into the channel survey that appears before you register for or watch your first webinar that is hosted by ISC2.
When filling out the registration form for an ISC2 webinar, you will be prompted to fill in the following form (right side) that includes your ISC2 member number.
Important: Once you have entered your member ID, ISC2 transfers your registration information into their internal database, and BrightTALK will no longer be able to modify or add the number at a later point.