The full case caption appears at the end of this opinion.

Defendant pro se Philip Baptiste appeals from so much of a final judgment of the United States District Court for the Southern District of New York, John E. Sprizzo, Judge, as (a) declared that his right to claim sole authorship of the song “Sea of Love,” written in 1957, is time-barred, and (b) enjoined him from challenging the rights of plaintiff music publishers Fort Knox Music Inc. (“Fort Knox”) and Trio Music Company Inc. (“Trio Music”) to the song. Plaintiffs cross-appeal from so much of the judgment as denied them attorney’s fees under the Copyright Act, 17 U.S.C. 505, in connection with the present action. On appeal, Baptiste, in addition to challenging the judgment against him on its merits, contends that the district court lacked personal jurisdiction over him. For the reasons that follow, we remand to the district court for supplementation of the record with respect to the basis for its ruling on the jurisdiction issue; we address no other issues at this time.