Soviet anthem - Soviet National Anthem

Retrieved December 19, 2009.

The wikipedia page has a copy of the 1944 sung by the red army and a 1955 instrumental, The instrumental 100% being unencumbered as copyright would have expired in 2005, but the earlier vocal version being iffy due to one of the authors being alive until recently, and it's best avoided, to be safe from his estate.

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So, in 1977, in celebration of the 60th anniversary for the creation of the Soviet Union through the October Revolution, revised lyrics were created which removed the nods toward Stalin, as well as many other references.