Which ancient civilization was the first to use standardized 'brand seals' on commercial products to guarantee quality and origin, creating an early system of product authentication?

Before modern logos and slogans, ancient civilizations had their own methods of brand recognition and market differentiation. Merchants, artisans, and traders developed unique symbols, seals, and reputations to distinguish their products in bustling ancient marketplaces. This poll explores how early civilizations established commercial identities that influenced trade across continents, setting the foundation for today's brand concepts.

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Ancient Egypt (using cartouche-style seals on pottery and goods)
Mesopotamia (using cylinder seals on clay containers)
Ancient Greece (using amphora maker's marks)
Indus Valley (using square stamp seals on traded goods)