The Data Hub is a tool included with your GS1 membership and uses your GS1 Company Prefix (the number that uniquely identifies your company) to create GTINs to uniquely identify your products. A key benefit of the Data Hub is that some retailers (and Amazon) use this tool to validate UPC ownership. For new members, GS1 US offers training webinars for the Data Hub for $79. Companies who use the GS1 Barcode Service are not required to purchase the webinar since UPC management and Data Hub uploads are included. Please call us at 800-662-0701 x250 or visit GS1 Barcode Service.