Showing/Hiding multiple HTML elements with AngularJS

I'm new to AngularJS and I'd like a review on my approach to handle prizes being reclaim.

The process is as following:

• User enters prize list page;
• Click on a Reclaim Button;
• Provide me with his/her Social Security Number (as a way to strongly confirm that the prize chosen is the actual desired one).
• If the prize is deliverable, collect user's delivery address, otherwise just tell them that the voucher has been sent to their email account.

<div ng-controller="ReclaimController as reclaim">
    <div ng-hide="loading">
        <div ng-show="prize.error">{{prize.message}}</div>
        <div ng-show="prize.success">Specific success message here</div>
        <button ng-click="request(prize)" ng-hide="prize.requesting">Reclaim</button>
        <div ng-show="prize.requesting">
            <span>Please confirm your SSN: </span>
            <input ng-model="ssn" type="text" ui-mask="blablabla"> 
            <button ng-click="reclaim(prize, ssn)">Reclaim</button>
        </div>
        <div ng-show="prize.success && prize.deliverable">
            <address-form></address-form>
        </div>
    </div>

    <div ng-show="loading">
        Loading...
    </div>
</div>

I'm not sure if I'm right or wrong about the following, but here is my thoughts on it:

• prize.error, prize.success and prize.requesting are not database attributes

  My first reaction was that I should not be doing this, but then it occurred to me that if I'm building a whole software in the front-end, I shouldn't worry too much about modifiying the model to attend my needs. Still, after reaching 3 attributes and possibly more later on, I feel like I should at least try to clean it up a little bit. Maybe a single object inside it like prize.view = {} and put error, success, requesting, etc inside it?

• Depth of showing/hinding elements.

  When the controller calls the load in the Prize Service, nothing is shown as we're waiting a server response [1], then I show prizes with reclaim buttons [2] which are replaced by a small form that is suppose to guarantee user confirmation [3] that may or may not result in a address collection [4]. I'm a little overwhelmed with this deep game of hiding and showing content. Should I be worried about it? Although AngularJS makes it extremely easy, it seems like I'm abusing it (and not in a fun way).

To sum up, what do you think about manipulating data in a model that only serves the view? Would it be possible to simplify the code without losing the user experience in choosing a prize, confirming the choice and providing delivery information?