Suppose Bob publicly claims to possess the Sci-Hub db. Alexandra challenges this publicly by sending a bunch of randomized small "slices" of the db to be hashe

Suppose Bob publicly claims to possess the Sci-Hub db. Alexandra challenges this publicly by sending a bunch of randomized small "slices" of the db to be hashed. Bob publicly broadcasts the requested hashes, and Alexandra publicly claims they all match. (Also, assume the hash-checker is publicly available and anyone who dares can use it to check their own copy of the db and verify Bob's hashes.) If this is the extent of Bob's network activity, can Bob get in trouble in the U.S.?