Methods and apparatus for establishing network presence. In an embodiment, a method is provided for determining a presence score. The method includes capturing an image of a QR code displayed on a secondary device, capturing a sound clip of a sound signal reproduced on the secondary device, and transmitting the image and the sound clip to a server. The method also includes receiving a presence score determined from at least one of a comparison of the QR code to the image and a comparison of the sound signal to the sound clip.