Perhaps I can enter a video chat on whatsapp with one of the DT members and show my passport, in which there is an entry about the presence of my son, born in 2002.
I'm not sure that would really help. All that would prove is that you indeed have a 17 year-old son. Unless you and your son can join the video chat together. In that case identification wouldn't really be necessary, in my opinion. By your local time setting it looks like you are in central Asia. Maybe you can convince LoyceV to participate in video call with you and your son.
brought me here, so I'll respond quickly: I'm not going to do any video chat, because that's almost as bad as doxing myself.
I had a very long day and I'm far too tired to look into the details, but if I have some time tomorrow, I'll share my opinion on this case.