Bitcoin

35GEuTnLYxBnDJioy2oRcxXaZJ8ayF8miD

Black background with a complex white maze and three QR codes in the top left, top right, and bottom left corners.

Ethereum (ERC-20)

0xdeDB288337acE7B8cCE7129802eCc2C2De5d7696

Black and white QR code with three larger squares in corners and detailed patterns in the center.