As you can understand I won't be providing contact details of my contacts. I have however already stated that data sheets and packaging for future lenses are already in the pipeline.
If it can't be proven, then the solution is very simple to me:
1. Let us not advertise them as Zeiss lenses, until this can be proven.
2. Instead, advertise them as high-quality aftermarket lenses. LG does this and people still buy their product.
Let the people advocate about the quality if Zeiss's hand in this cannot be proven outright.