ayant droit

one who holds, but did not generate, a given right; especially, a copyright holder who has inherited the copyright from an author

“2009, Marie-Catherine Beuth, “Fronde contre Google dans le livre numérique” (“Opposition to Google in the Digital Book”), in Le Figaro, 2009 August 22” — Microsoft, Amazon and Yahoo! join the Open Book Alliance, a coalition opposed to the agreement between the Internet group [Google] and American copyright holders.

From ayant (“having”) + droit (“right”).