I also posted this in the bathroom tile forum, but there isn't much action there

We started scraping away the current tile in our bathroom and the layer underneath is a black, tar-like layer. In a nearby closet we found a floor tile (either 8x8 or 9x9) that is a black asphalt type tile with a paint-splatter type pattern on it and we think this is what that layer is. We also think this is an asbestos tile. Anybody know for sure?

If so, what are our options? Under the ceramic tile is this black layer substance, then plywood, then the original yellow pine hardwood flooring. So these layers are already at a height that is well above the wood flooring in the hall outside the bathroom. I don't think building right on top of all this is the best idea.

Removal? Can we do this ourselves? What do we do?