Which ancient civilization pioneered the concept of 'brand seals' - unique markings on products that authenticated their origin and quality, similar to modern brand logos?

The ancient world had sophisticated retail systems long before modern commerce. From the agoras of Greece to the forums of Rome and bazaars of Mesopotamia, ancient civilizations developed innovative commercial practices that sometimes mirror today's retail strategies. This trivia question explores how ancient merchants pioneered retail innovations that we might consider surprisingly modern.

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Mesopotamia (specifically Babylonians), who stamped clay tablets with cylinder seals to verify merchant identity and product authenticity
Ancient Egypt, who used hieroglyphic cartouches on pottery to indicate royal workshops and premium goods
Ancient Greece, who marked amphorae with distinctive symbols representing different city-states' exported goods
Han Dynasty China, who used official stamps on silk and pottery to indicate imperial quality standards