A GTIN is a universal product ID. If your ring has a GTIN, any agent, warehouse, marketplace, or retail system in the world can look it up and know exactly what it is—the material, weight, color, maker, and price. GTINs are the backbone of modern supply chains and agentic commerce.
For AI agents, a GTIN is proof of authenticity. When an agent sees a product with a valid GTIN, it can cross-reference that GTIN across multiple vendors, verify pricing, check reviews, and assess whether the product is genuine. Without a GTIN, agents have no way to verify that your "$5,000 Rolex" is actually a Rolex and not a counterfeit.
In jewelry specifically, GTINs are often missing or wrong. Handmade or custom pieces don't always have barcodes. Vintage items may not have been assigned GTINs. But for agent commerce to work at scale, jewelers must either provide legitimate GTINs (for branded or mass-produced items) or adopt alternative identifiers like SKUs that are consistent across sales channels. Arbling helps merchants assign or validate GTINs for their catalogs and fills gaps with alternative identifiers that agents can trust.
GTIN is the parent standard; UPC (12 digits) and EAN (13 digits) are regional variants. When in doubt, use EAN-13—it's accepted worldwide.