Season beef with salt, pepper, cumin, garlic powder, onion powder, and chipotle.
Sear beef in olive oil until browned.
Transfer to slow cooker or oven-safe pot.
Mix broth, vinegar, tomato paste, and oregano.
Pour mixture over beef.
Cook on low 7–8 hours or at 300°F for 3–4 hours.
Shred beef in the pot.
Mix to coat evenly.
Simmer briefly to thicken if desired.
Rest 5 minutes before serving.