[5][3] His father was born in Sokhumi, GSSR, USSR (present-day Georgia) into a wealthy Pontic family that cultivated and sold tobacco.

[6] He completed three years of mathematics studies at Aristotle University in Thessaloniki starting in 1967 but left to pursue music and because he felt his education was stymied by the strict censorship introduced by the Greek junta.

[citation needed] Sidiropoulos' music career began in 1970 in Thessaloniki when he and Pantelis Delleyannidis formed Damon and Phintias, which took its name from the Greek legend exemplifying friendship.

[5][6] He also collaborated with Yannis Markopoulos on one of the three albums they worked on together throughout Sidiropoulos' career: Thessalikos Kyklos (Thessalian Circle), 1974; Oropedio (Plateau), 1976; and Tolmiri Epikinonia (Daring Communication), 1987.

[1][4][5] In 1982, he again ran into trouble with censorship, this time with his album En Lefko, in which three of his songs ("I", "Adergraoud Me Stras", and "Istati Stigmi") were heavily censored due to references to drug use and other behaviors Minos EMI deemed anti-social.

[3][1][4] In 1991, Oi Aprosarmostoi released Ante ke kali tichi maghes, an album with the same name as one of Sidiropoulos' earlier songs.

[citation needed] Sidiropoulos had a brief acting career, with appearances including writer and director Andreas Thomopoulos' films Aldevaran (1975) and O Asymvivastos (1979); director Eugenia Fakinou's play In Kurdistan (1977) at Theatro Kava in Athens; and in the TV show Oikogeneia Zardi (The Zardis Family; 1983).

[2][5] On 6 December, he fell into a heroin-induced coma at a friend's house in Neos Kosmos and died in transit to the hospital[1][3][2] after suffering a heart attack caused by the overdose.