Do Soviet songs have copyright now?

Question

Audio

First of all, they are interested in well-known children's songs, like "a grasshopper was sitting in the grass." How can I check if they can be used commercially?
Google does not give anything relevant, the maximum is a court decision on copyright infringement on the above track in 2008.

Answer 1

If we are talking about the works of the Soviet period, then there was such a moment:
https://habr.com/ru/post/223701/upd
. The bill was rejected, and the copyright still exists.