Accepted as Early Decision. Do I have to withdraw my other applications before decision?

I’m a financially need student and got accepted already. They are working on my financial package, and from there I can decide whether I would afford it or not. I will not submit the acceptance letter until I receive my package.

Anyways, am I allowed to just see whether the other schools would accept me or not? I did invest time and money on those regular decision applications, so I’m curious whether I got accepted or not, though my Early Decision admitted school is my first choice.

If I do this, would my ED school blacklist me? What could be the consequences.