Apple Product verification
What will be shown when the Serial number is entered to this link https://checkcoverage.apple.com/qa/en/ for an iphone which is not unsealed and which is not activated,
If you bought it at an Apple Store or Authorized Reseller, they should have already comunicated your purchase to Apple (I think within 24 hours).
Warranty and assistance coverage starts from the date of purchase of your device.
Regards
Giulio