You can get QSL card by receiving SEEDS's voice.

  QSL card verifies that you recieved SEEDS's voice. We want you to receive SEEDS's voice. And please report it by using website. We will send you QSL card to verify it and tell our appreciation.
  We will send you 4 kinds of QSL card. 1st one is "CW" QSL card which will be send to people who received CW signal. 2nd one is "FM packet" QSL card. 3rd one is "Digi-Talker" QSL card. Final one is "SSTV" QSL card. Now you can only see "CW" QSL card. "FM packet" QSL card is comming soon.
  "Digi-Talker" and "SSTV" QSL cards are secret. You can get "Digi-talker" QSL card by hearing keyword of SEEDS's voice. And also we send "SSTV" QSL card to only people who recieved image data from SEEDS. Please listen to SEEDS's voice and receive the message.

  QSL card sending form is here