Okay, they can “expect” all they want. Doesn’t matter. Doesn’t mean anything, and they have no power if they don’t own the copyright themselves, and if they do then they are just choosing to act and nothing about copyright law requires they choose to act.
That’s not how copyright law works. You don’t have to defend it or risk being sued.
Copyright law actually has specific exceptions for libraries and hasn’t been updated for the modern world, which is the actual problem.
Families of original holders will expect labels to do this
Okay, they can “expect” all they want. Doesn’t matter. Doesn’t mean anything, and they have no power if they don’t own the copyright themselves, and if they do then they are just choosing to act and nothing about copyright law requires they choose to act.