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What's your evidence for potential plagiarism?

Ferify yourself with a picture of yourself holding a peace of paper with your steemit username and the current date with your artwork. Lots of people take credit for someone else's work.

I think you mean him, not me. All of my art posts link back to multiple social media profiles and my ArtStation account where some of my work is posted at, while the rest is on other art sites or mentioned via Facebook.