I can’t positively claim that’s the case but I wouldn’t be surprised if your registrar has to give out your information if a valid legal claim comes in.
How does a website determine if a copyright claim for some user-generated content is valid? I think they just look if it’s roughly plausible and then give out your data and let you fight it out.
The problem is that an Abmahnung doesn’t really come from some state authority but just a lawyer. Maybe confirming that it’s from a real lawyer would be enough though.
I think you’d need to get a court order. You may be able to get that if you are a direct competitor. Essentially, unless you have a competitor who has a keen interest in making your life miserable, nothing will happen. The days were lawyers themselves could send you ceise and desist letters just to earn some money are long gone.
"The days were lawyers themselves could send you ceise and desist letters just to earn some money are long gone."
I don't think so, just their peak is gone. Lawyers still send letters - but they never had legal weight. It is basically a deal(or exortion), just pay this small sum now, or I have to go to court and then you will have to pay a lot.