Abstract: The disclosure includes a method for constructing and indexing a database of anonymous visitor tracking. Implementations of the disclosed methods may utilize a client-side script, first-party cookies, and canonical name records to track the visitor across affiliated websites hosted on different domain names. The disclosure also includes a system for constructing and indexing a database of anonymous visitor tracking. In one implementation, the system includes a network interface device, at least one memory storing instructions, and at least one processor that executes the instructions to receive, determine, generate and transmit first-party cookie information.