Great, well thought out, ideas and goals. Unfortunately, the next sound you hear will be me bursting your bubble. As I mentioned earlier, I have access to initial sales and owner data for all of the 1,785 Porsche 914-6 cars imported to the USA in 1970 and 1971. We provide some of that information to club members in the form of a certificate. No owners' names or street addresses. It was a huge time consuming effort to get permission to release even limited information.
There is no way one could get 50 state governments, the District of Columbia, and assorted US territorial governments to agree to cooperate in maintaining and sharing vehicle historical information, even if the 50 year old records even still existed. You may have noticed there are a few issues of procedural disagreement between the nation's elected officials currently.
Establishing a baseline by encouraging club members to maintain records and historical data on their cars with the intent of passing it on to subsequent owners is probably the best one can hope for. Remind folks that a well documented car will generally be worth more than one without a historical record. Our Porsche club has a booklet for recording the car's historical information and storing receipts and maintenance records.
As I said, great idea. Keep brainstorming alternatives.