Modern iterations of Sportloto (now managed by Stoloto) use various upbeat, generic corporate orchestral or electronic themes during their broadcasts. How to Listen or Download
Search for "Спортлото музыка" or "Popcorn Gershon Kingsley" to find high-quality uploads. You can use services mentioned in general guides like the HP Tech Takes on free music downloads to find legal ways to acquire the tracks.
The Internet Archive often hosts older Soviet television broadcasts and soundtracks that may include the original broadcast audio.
Since "Sportloto" itself is a brand and not a musical artist, searching for the specific track name is more effective:
The most famous melody associated with Sportloto is actually an electronic instrumental piece called originally composed by Gershon Kingsley in 1969.
The version heard on Soviet television was typically the cover by the Anarchic System or a similar synthesizer arrangement.