What you want to proof actually? Telegram details show that project refuse to pay since February and you reporting project for scam after 6 months. Look like project already dead, Their social accounts has no activity. You should do your own research before joining any bounty and this is not the first case. 50% of bounty not paying, so I will recommend to join only escrow bounty from best bounty managers Mr IRfan,Royse777,Julerz, bounty detective and Sujonali.
OP you have not join the bounty, on whom behalf you open this scam accusation?
Yes best bounty managers Mr IRfan,Royse777,Julerz, bounty detective and Sujonali.
I saw that there was a lot of discussion about this topic on social networks, so I brought it up here