I have no idea what the exact hardware inside of the camera is, but almost every microcontroller has something like eFuses or one time programmable memory in th

I have no idea what the exact hardware inside of the camera is, but almost every microcontroller has something like eFuses or one time programmable memory in this day and age. Not a lot of expensive engineering required, just a few hours of software development for the camera firmware and SDK developers. It'll be good enough for most warranty cases you can now hand wave away.