Physical AI will not be built on perception alone. Machines operating in real environments need to know which specific objects, assets, locations, and interactions they are dealing with. Identity infrastructure creates the trusted layer between perception, decision-making, and action. That is why identity may become one of the most defensible layers in the Physical AI stack.

Barcodes helped create the first bridge between physical objects and digital systems. But industrial automation, Physical AI, authentication, and machine-readable environments now require more than printed data carriers. They require physical identity infrastructure that can resolve specific objects, connect them to trusted digital records, and support reliable action.

Machine-readable codes created connectivity between physical objects and digital systems, but connectivity alone does not create trust. As Physical AI expands into real-world environments, reliable identity infrastructure becomes essential for verifying authenticity, enabling secure interaction, and ensuring that physical systems can be trusted at scale.