Learn how Bitcoin’s heaviest-chain rule selects the main blockchain through an interactive visualizer that animates competing forks in real-time. See miners racing to extend their chains, watch cumulative proof-of-work calculations, and understand why the longest chain wins.

This course module includes hands-on demonstrations of blockchain reorganizations, orphaned blocks, and side branches. Perfect for developers, researchers, and cryptocurrency enthusiasts who want to understand Bitcoin’s core consensus mechanism beyond theory.

• Interactive fork and reorg visualizer with live chain animations
• Real-time cumulative proof-of-work calculations and comparisons
• Visual demonstrations of orphaned blocks and side branches
• Step-by-step explanations of the heaviest-chain rule
• Module 21 content with visual lab badge on homepage