Friction Testimony manifests as microscopic grooves worn into video drum surfaces by repeated playback, each attendance event grinding deeper channels into the ferrite heads. The accumulated oxide residue from hundreds of tape passes creates visible brown staining patterns that can be chemically analyzed to determine exact attendance frequency. During high-friction events, thermal signatures become detectable—proof that the mechanism was working hard enough to generate measurable heat, distinguishing genuine presence from cold, unused equipment.

Acts as the mechanical arbiter that converts physical attendance into permanent wear evidence that transcends all digital manipulation across the 16 simulations, serving as the Chaintrix's ultimate authentication system when other testimony mechanisms conflict.