Blanc de hotots ears aren't just larger, their whole bodies are. They are a much larger breed than d. hotots. Also blanc de hotots and d. hotots bred to standard, don't have colored ears but would be white. And this is speaking from some experience, as I have dwarf hotots that were bred to show standards.
Without having an actual pedigree from a trusted breeder, you can't really know for sure, even if a rabbit looks to be a specific breed. I would say some dwarf based on the head shape and size of the rabbit. But that coloring, including having coloring around the eyes, doesn't necessarily point to a specific breed, including d. hotot. Especially since the fur is brown, and chocolate d. hotots are pretty rare still I believe. Could possibly be a mismarked chocolate d. hotot or a n. dwarf with longer ears outside the breed standard, mix of both, mix of one with something else, or neither breed and is a mix of some other rabbits.
Even inside the breed of d. hotot and n. dwarf, there can be such a variety that you may not think it's the breed it is. There are d. hotots that come out looking nothing like the breed standard, that are mismarked, or have sport markings and look more like a dutch mixed rabbit when they are really d. hotots. Then you can have dwarf rabbits coming out larger than the breed standard and are 3 lbs or over that are generally referred to as false dwarfs, or with a different head shape than standard dwarfs, or with longer ears than the standard.
I had a pure bred d. hotot that was a false dwarf at over 3 lbs and had a more pointed nose and longer ears than his siblings, but he was a d. hotot with all of the d. hotot standard markings. His brother is a standard size d. hotot with sport markings and that looked nothing like him. And his mom, sister, and another 2 brothers all had the standard d. hotot markings, body size, and short ears within the breed standard. So a variety even in just one litter.
So with your rabbit, you can probably say he's a n. dwarf if you want, since he pretty much looks like one even though he has longer than the standard ears, but there's no way to know for sure. And even then, pure bred just means that the rabbit has a pedigree back 3 generations, of rabbits that generally met most of the breed standards.
All rabbits, even 'purebred' ones, are really just a mix of different breeds to get to what the breed standards are today. Dwarf hotots were mixes of n. dwarf, blanc de hotot, and dutch rabbits. And those rabbit breeds will have their own mixed breed genetics too. All originating from the european wild rabbit.
