photo of my own roots rose
It is not easy to get an own roots rose. But, I was lucky to have this one just sprout spontaneously. I don't know if it from a "seed" or from a piece of root of another rose that was here before but removed. I don't know if it will bloom. If it blooms, that should help be figure out what kind of rose it is. It looks really healthy and does not have any fungal problems.
Here is a link that might be useful: Own Roots Rose Photo