(3) Elements of notification.—
(A) To be effective under this subsection, a notification of claimed infringement must be a written communication provided to the designated agent of a service provider that includes substantially the following:
[...]
(vi) A statement that the information in the notification is accurate, and under penalty of perjury, that the complaining party is authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.
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I'm having trouble figuring out if there's any way they could have a good faith belief that they were the copyright holders here (I suspect not), though I do not know whether or not they ever sent DMCA notices containing all of the elements.
https://www.law.cornell.edu/uscode/text/17/512
(3) Elements of notification.— (A) To be effective under this subsection, a notification of claimed infringement must be a written communication provided to the designated agent of a service provider that includes substantially the following:
[...]
(vi) A statement that the information in the notification is accurate, and under penalty of perjury, that the complaining party is authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.
=====
I'm having trouble figuring out if there's any way they could have a good faith belief that they were the copyright holders here (I suspect not), though I do not know whether or not they ever sent DMCA notices containing all of the elements.