Rightsholders Can't Sue Without a Copyright Certificate, Supreme Court Rules - TorrentFreak
https://torrentfreak.com/rightsholders-cant-sue-without-a-copyright-certificate-supreme-court-rules-190305/

米国:著作権侵害訴訟には著作権登録の完了が必須との最高裁判決 – P2Pとかその辺のお話R
https://p2ptk.org/copyright/1683