Born on December 13th, 1902 in the village of Kaniv, Cherkassk region of Ukraine. His father was an orthodox priest, his original family name was Slutskyj.
1921–25, he studied at the Kiev conservatory (class of O. Muravjova). During his studies, he sang in the famous Ukrainian
a capella choir "Dumka".
Platonov was the first to record one of the most famous Ukrainian folk songs of all times, "Nich jaka misjachna".
Around 1925, his singing in the capella was noticed by the great K. Stanislavskij, who invited him to Moscow, to his opera studio.
In 1934, Platonov got back to Kiev, where he befriended the famous Ukrainian soprano Zoja Gajdaj, whom he later married.
The years right before WWII were probably the peak of Platonov's career. He succeeded in becoming one of the most famous soloists of
the Kiev opera theater. The Ukrainian public adored him. Many records of his voice were published at that time. He was also featured
in many movies; for example, he played the central role in the first ever Ukrainian opera-movie "Natalka Poltavka", directed by Ivan
Kavaleridze (1936).
In the early 1950s, Platonov moved to Russia. He sang at the Samara opera theater, and later worked at the Kaliningrad Philharmonic,
where he met his second wife – L. Borisova.
In the mid-1950s, Platonov and his wife received an invitation to work at the "Red Torch" Theater in Novosibirsk. Later Platonov
worked in Novosibirsk as the head of the vocal department of the Theatrical College and taught voice.
He passed away in Novosibirsk on October 8th, 1968 and is buried there.