Factual error: When Blade notices the piece of Dracula's armour in the Nightstalkers' headquarters he's shown an image of what the full armour looks like. It'd be impossible to extrapolate a full suit of armour from such a small piece.
Factual error: Although the city where Blade Trinity occurs is never named, the involvement of the F.B.I. would suggest somewhere in the United States. However, as Blade chases Drake out onto the rooftops to save the baby Drake stole, you can see the Sears tower spire in Vancouver Canada and the sun burned image of the Hudsons Bay symbol on the wall behind him. So, they are on the roof of The Bay building in Vancouver. (00:56:05)
Factual error: When Drake is about to go into the Dracula shop, you can see a marquee that says "Hastings, V6B 1H6" indicating it is in Hastings, Vancouver, British Columbia. Later in the scene when he throws the man through the window, the sign next to the window mentions Canada's Labour Party, and also says "Canadian International" on it. The movie was filmed in Vancouver, but is supposed to take place in an unspecified city in the United States, given that the FBI is trying to bring Blade down, plus the chief of police mentioning the vampires are pulling the homeless off the streets of America. (00:48:40 - 00:50:25)
Answer: It's "Hard Wax" by Manchild.