@geronimo, what kind of proof do you need? I have many pics of me in Steemit. You can see that I am the person writing analyses for the site www.alpari.com/ru
Look at the picture of the link (the source) you have put: https://alpari.com/ru/analytics/reviews/cryptocurrencies/25050_26032018/
That is me! You can even write to the email on that page, and I will send an answer to you from that email.
And this is me, as well: https://alpari.com/ru/analytics/analysts/petkov/
I write articles for this site. This is my job.

Please, write back!
I am waiting for you answer.