Perhaps, but prototype cars would not have been built on the regular assembly line and as such would not have a fender tag, VIN,build sheet,,,hence its is really hard to prove a pedigree on those.
They make a run of PVP (pre volume production) cars about 6 weeks before model year launch that are supposed to be built with production tooling... All parts are supposed to be made from production hard tooling... Any parts that are not off production tooling must have an approval and be certified that the prototype part will be as good as the production part...
The purpose of the PVP builds is to test run the supplier's tooling and parts and also to test the production line tooling and fixtures to make sure that everything is ready for production launch.... This way they have 6 weeks to get any bugs worked out that they find on the test build...