[PeterisP]

Yes, Russia is (still?) a signatory to the European Convention on Human Rights, in which it agrees to be bound by decisions of ECHR. There have been quite a few ECHR cases where monetary compensation was awarded from Russia to someone, and up until now Russia has been complying with these decisions and paying these compensation amounts.

[int_19h]

Russia in the process of amending the constitution right now to, among other things, specifically declare priority of Russian law over any decision of international courts.

[SergeAx]

This is not correct. The amendment text is about priority of Constitution, not all laws. So that mostly means no same sex marriage for Russian citizens.