Methods and apparatus to perform network-based monitoring of media accesses

A non-transitory computer readable medium comprising instructions, which, when executed, cause processor circuitry to at least:

• determine whether a census impression record corresponds to a panelist impression record by:
• comparing a first public internet protocol (IP) address of the panelist impression record with a second public IP address of the census impression record to identify a household;
• comparing a first private IP address of the panelist impression record with a second private IP address of the census impression record to identify a device in the household;
• and
• comparing a first timestamp of the panelist impression record with a second timestamp of the census impression record;
• and
• send a comparison result to a computer of an audience measurement entity, the comparison result indicative of a match confirming the census impression record corresponds to the panelist impression record of the audience measurement entity.

A method comprising:

• determining, by executing an instruction with a processor, whether a census impression record corresponds to a panelist impression record by:
• comparing, by executing an instruction with the processor, a first public internet protocol (IP) address of the panelist impression record with a second public IP address of the census impression record to identify a household;
• comparing a first private IP address of the panelist impression record with a second private IP address of the census impression record to identify a device in the household;
• and
• comparing, by executing an instruction with the processor, a first timestamp of the panelist impression record with a second timestamp of the census impression record;
• and
• sending, by executing an instruction with the processor, a comparison result to a computer of an audience measurement entity, the comparison result indicative of a match confirming the census impression record corresponds to the panelist impression record of the audience measurement entity.

A system comprising:

• at least one memory;
• programmable circuitry;
• and
• instructions to cause the programmable circuitry to:
• obtain a public internet protocol (IP) address associated with a household and a timestamp in response to a census impression request indicating a media access on a first client device of the household;
• distinguish the first client device from a second client device of the household based on a comparison of a first private IP address of the first client device and a second private IP address of the second client device;
• store the public IP address, the first private IP address, and the timestamp in a panelist impression record in association with a panelist identifier, the panelist identifier corresponding to a panelist audience member of an audience measurement entity;
• send the census impression request to a census system;
• and
• send the panelist impression record to a meter collection system.