It's a dinosaur without clothes. Well, it's actually my other skin before I put clothes on it.
No copying. Obviously you can edit it and use the edit as your skin in Minecraft, but don't upload anything that's too ridiculously similar.
I would do a backstory but... well... it's a dinosaur.
This is all original content. If you see a skin that looks really similar, it's either a huge coincidence, or someone's copying me.