CAIN stands for Copyright-owner Automated Infringement Notification - It is a system designed to allow creators receive automated notifications when we detect their works have been stolen by others.
This is an initiative by Project Copy-Knight - Learn more about what we do
This link specifically means:
If you'd like to change your preferences, paste a new mark into your profile from here. If you'd like to opt-out, simply remove the mark.
Full technical details and definitions for the CAIN mark is available here - CAIN Specification