That kind of stuff happened 30 years ago but today? With the amount of information being shared I kinda doubt a top prospect could pull this off. It's not like Levshunov came from nowhere, there should be some kind of paper trail available on his development.
Ya, my son is born in Belarus, it’s pretty straight forward there, like here, if anything a little stricter, you can’t make fake Birth Certificates unless you’re part of Lukashenko’s entourage.
Like you said, the CCCP days are over, everyone has internet, it’s not happening.