Methods and apparatus to measure exposure to streaming media are disclosed. An example apparatus includes for measurement of exposure to streaming media includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to: access metadata identifying media presented to a user, and cookie data, the metadata and the cookie data provided by a client device; determine whether the cookie data identifies the user to a database proprietor; in response to a determination that the cookie data does not identify the user to the database proprietor, send a redirect message instructing the client device to retransmit the metadata to a next-hop location; and in response to a determination that the cookie data does identify the user to the database proprietor, provide the metadata and a user identifier to a central facility.