METHODS AND APPARATUS TO USE CLIENT-SERVER COMMUNICATIONS ACROSS INTERNET DOMAINS TO DETERMINE DISTRIBUTED DEMOGRAPHIC INFORMATION FOR MEDIA IMPRESSIONS

摘要

An example apparatus includes message generator circuitry to generate a first message for a first server of a first Internet domain in response to detecting a login event at a client device, the login event associated with an Internet-based service of a second Internet domain, the second Internet domain outside the first Internet domain, and a communication interface to receive a second message from the first server, the second message including a global unique identifier (GUID) and a login timestamp, the GUID identifying at least one of the client device or a user of the client device to the first Internet domain, the message generator circuitry to generate a third message including (a) the GUID, (b) a cookie identifier associated with the second Internet domain, and (c) the login timestamp, the third message to cause generation of an identifier-to-cookie map at a second server of the second Internet domain.