It does violate HIPPA.
I was a medical provider for nearly 9 years, up through last year. It is a breach of medical privacy to require proof of vaccination to attend concerts, go to the store, work etc.
It is however NOT a breach of privacy for a company to provide access to records on a digital device such as an iPhone nor is it a breach when an individual VOLUNTARILY discloses this info.
My perspective: This is the worst slippery slope we've seen since WW2. We are about to see society split into two classes of people; those that have vaccinated and those that have not. With privilege and opportunity extended to one and not the other. This is a wild and horrible thing to see happen. I'm not anti medicine, anti science or even anti vaccine. But I'll absolutely not be allowing my body or my family to be part of an international "phase III" trial of a vaccine system that has NEVER been allowed to be injected in humans until this year. 5-7+ years is the normal vaccine testing window. There are reasons mRNA therapeutics have never made it beyond animal testing. Look it up. This is not normal.