The first song leaked, apparently found on a USB key in a washroom stall in Lisbon.
This is what happens when you run the end of the song through a spectrograph:
…you may recognize Mr. Creepy Hand from iamtryingtobelieve.com:
Also, another hidden number was found on a T-shirt: 1-310-295-1040
Here’s a bad recording of what you hear when you call it.