Thank you for this interesting info about this polish actor and singer ( Lech Dyblik).
There is also a very interesting Russian singer who also sings about prison life:,
he’s name is : Gennadi Molchanov

https://www.youtube.com/playlist?list=...

He is a very non-trivial and talented person: a recidivist who once served many years in the prisons and lagers of the USSR for common crimes! (and now he performs in them giving concerts for inmates...)