To register your Philips Google TV, you can use the convenient QR code found in the quick start guide.
It is also displayed onscreen during initial setup and can be found in the Help Application as well.
The actual URL is https://www.usa.philips.com/myphilips/register-your-product
You will simply need to setup a Philips account and then provide the Model Number and Serial Number. You can also upload a photo of your POP for safe keeping if you wish.