There will be a number stamped into the roll bar on the passenger side. That is the number issued when the car is first teched. It is registered and is listed in the log book. The log book is the only complete record for the car. The SCCA does not keep those records other than the log book number. If the log book is lost or destroyed, the SCCA can issue another one, but the individual races/events/ and notes are lost. Sometimes you can fill in some of the history if you know the drivers name and the car by searching the archives for race results. The log book will list the races attended, crash damage, things that need to be updated by the next race, and annual tech inspections. It will have two pictures of the car as raced, the transponder number, the roll cage specs, weight, race class, engine size, etc. in the front cover. Here is a picture of what a log book looks like.