If we can add Porsche Laptimes, we should be able to add yours.
However, its only hearsay, there is no shred of proof whatsoever beyond word of mouth, If were we to add your laptimes, what would be the difference in other people just saying they did laps too? I could say I ran my Nissan and my Mazda round the Ring in 6:42.5s, and it could be added without a source beyond what I say. I say we should add them ONLY because we can add Porsche Laptimes or other manufaktur claims, but I also say we cant only because of no proof what so ever.
Member or not, company or not, I think proof should be available for every lap regardless of claim.