What the WCA does
The World Cube Association handles official cube-solving competition rules, rankings, and results for the global speedcubing scene. Since the domain was registered back in 2004, it has the look of a long-running institutional site. The Amazon-issued SSL certificate adds basic encrypted browsing, which is a good standard signal for a legitimate organization website.
Reputation and verdict
Within the speedcubing community, WCA is widely known as the authority for official tournaments and recognized records. That kind of niche reputation usually means a site is stable and low risk. Given the age of the domain, the HTTPS setup, and the very clear organizational purpose, this looks trustworthy and safe to visit.