zhèng
proof
Phonosemantic compound. 讠 represents the meaning and 正 represents the sound. Simplified form of 證.
Components
Evolution

Seal script
Shuowen (~100 AD)
Clerical script
Western Han dynasty (202 BC-9 AD)
Clerical script
Western Jin dynasty (266-316 AD)Traditional script
ModernSimplified script
ModernDefinitions
Sources