Hi,
theonly really safe proovement is the transcript in my eyes. You can publish your transcript (protected with a password you can choose and always change) and then give the URL to anyone that is interested.
You also get some PDFs with cetrifications, but that is nice but not a real proove (someone might take an existing one and replace the name or something like that).
But I am also wondering if there is a proove required. At least for the company I work for, the certifications might give you an interview. But you really need to have the knowledge to get through the interview. And people who really have the knowledge will
not fake the certificatios. They just go to the exam and get the certification.
At least that is my personal view.
With kind regards,
Konrad