Fun game: cover up his freezebrand, put him in front of people, and say, "what breed?" Then watch their faces. I've gotten Andalusian, Morgan, Quarter Horse, Thoroughbred, the list goes on. (No one has ever guessed "dachshund" sadly.)
It's funny because what even is going on there with that conformation? sigh.
So I thought I'd link to a few posts I've done before about where he comes from, which is as close to tracking his bloodlines as I'll ever get.
Blog Hop: History of a Horse - about the Callaghan HMA where he was rounded up
Rescuing Wild Mustangs in Maine - about Tristan's rescue, and how we met
How to Identify and Read a Bureau of Land Management Freezebrand - just for kicks