The blockchain has timestamps, so actually you can verify quite easily. Unless, for some reason, the individual is sending bitcoins to himself...
1) Have 5+ BTC 2) Recognize a QR code on a TV broadcast 3) Think to pause the tv broadcast, decode the QR code and send BTC 4) Completely unaware of the 1000s of news articles and broadcasts about the soaring value of BTC
Maybe he sent it to himself, maybe someone else was just very generous, but no one purposefully sent 5BTC without knowing it was valuable.