Checking What Monitor Profile is Being Used in Photoshop

To check what monitor profile photoshop is using, go to Edit->Colour Settings.

Drop down the RGB working space selector and in there (towards the top) will be an entry 'Monitor RGB - profile name'. You don't actually need to select this, but it's where you can confirm in Photoshop what profile it is using.

Note: It only confirms the profile in use for the primary monitor - the one the Photoshop menu bar is on.

Make sure you leave your correct desired working space selected as you exit this dialogue (for most people this should be AdobeRGB - much more on this in The Digital Fine Print - Colour Management Practise Part Two).