thats not how digital ownership works. theres plenty of software with offline versions that you dont “own” in the traditional sense

if you join the tor network other tor users proxy their trafic through a chain of tor users and therefore maybe though you, sometimes youre the exit node that then actually sends the request to the server in question, sometimes you just pass it on to another tor user.

so the person in the OP did technically send the reques to the server that served CP, but he didnt really have anything to do with it nor could he have even accessed the data.