His real surname was Rozenof. He sang in a Chorus, then goes to Milan to study with E. Brogi. Starting in 1895, Rosanov began to sing in Kiev, Kharkov (impresario Tsereteli), in Tiflis (1899, 1900, 1902), in Moscow (1899-1900, private opera, impresario Maksakova), in Vilnius, in Kazan (1901), in St. Petersburg (at the Akvarium), in Kiev (1903), in Novgorod (1904), in Saratov (1905/6, Russian opera, under control of Vronsky). From 1903-5, he was a soloist of the Moscow Bolshoi Theatre (here, he sang Sobinin, Gregori, German, Manrico, José, Raoul, and Turiddu. In 1905, Rosanov made his debut as Radames at the Mariinsky Theatre in St. Petersburg; in 1908, he sang at the conservatory; in 1909/10 at the Moscow Sergievsky House; and in 1910-12 at the Odessa Opera (impresario Bagrova). Guest appearances followed in Helsinki, Berlin (1907), Milano (2 seasons), Florence (one season), Genua (one season), Trieste (one season), Lisbon (1909, Teatro San Carlo), London, Buenos Aires (1909, Teatro Coliseo, Teatro Colon) and the USA. He possessed a pleasant and strong voice (tenore di forza). He was considered one of the best interpreters of the Wagner repertoire. He sang with Titta Ruffo, Hariclea Darclee, Mario Ancona.
Beka, Berlin 1907?
Eugene Onegin (Tchaikovsky): Lontan, lontan 8532
Ebrea (Halevy): Rachele allor che iddio 8538
Africaine (Meyerbeer): O paradiso 14038
Profeta (Meyerbeer): Pastorale 14039