I've checked your posts and there's a tx ID posted:
https://blockchain.info/ru/tx/25214fa905b1d4783ab4bdae9f4663d9350d63dec855be528722e2e3d45bea98If that's your address you can sign a message with it and that should be enough proof for everyone to know you are the owner. The only problem is that it takes a lot of time and begging before someone verifies you. If I were given the power to verify people's addresses and help them get their accounts back I'd do it for free.
It was a transfer transaction from the localbitcoin service (the goxbtc-realbtc exchange service) to the bitstamp address. I can not sign any of these addresses.