Sotnikova dethroned South Korea's Vancouver 2010 champion Kim Yu-Na on a night of drama and controversy at the Iceberg Skating Palace, with the 5.48-point gap between the pair raising eyebrows.
Basking in Thursday's victory in front of a full house of passionate home fans, the delighted gold medallist batted away questions about the judging, saying her victory was "a gift to Russia".
On Friday, Sotnikova's choreographer Pyotr Chernyshov insisted the 17-year-old -- winner of Russia's first ever women's individual figure skating gold -- was a worthy champion.
"You have to be an expert in figure skating to know the rules now. When you ask a professional figure skater there is no doubt who won on the night."
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Kim, 23, who confirmed she was retiring from competition after a glittering career, refused to be drawn into the swirling debate in the immediate aftermath of her victory.
But American Ashley Wagner, who finished seventh, said she was "speechless" about the result after seeing some of Kim's dance.
Within hours, the website of the popular online campaigning forum, Change.Org, crashed as hundreds of thousands logged on to sign a petition calling for a review of the judges' scores.
On Friday, the number who had signed the petition had soared to 1.6 million.