Methods and apparatus to monitor media

1. An apparatus to monitor media, the apparatus comprising:

at least one memory;

machine-readable instructions; and

at least one processor to execute the machine-readable instructions to at least:

generate a first database based on storage of a first data association of a first media identifier and a first timestamp to a second media identifier in the first database, the first media identifier and the first timestamp based on media obtained from a server, the first media identifier and the second media identifier to identify the media, the second media identifier from the server;

generate a second database based on storage of a second data association of a third media identifier and a second timestamp in the second database, the third media identifier and the second timestamp based on media monitoring information obtained from the server, the media monitoring information obtained from the server after an access of the media by a media device, the third media identifier to identify the media accessed by the media device; and

credit access of the media to the media device based on a mapping of the third media identifier and the second timestamp from the second database to the first media identifier and the first timestamp in the first database, the mapping based on a determination that the third media identifier corresponds to the second media identifier.

2. The apparatus of claim 1 , wherein the mapping is a first mapping, and the at least one processor is to perform a second mapping of the first media identifier and the first timestamp to the second media identifier in a look-up table in the first database.

3. The apparatus of claim 1 , wherein the at least one processor is to:

detect metadata in a portion of the media; and

decode the metadata to generate an output representative of the first media identifier;

compare the first media identifier to the third media identifier; and

identify the portion of the media based on the comparison.

4. The apparatus of claim 1 , wherein the at least one processor is to determine that the first media identifier and the second media identifier are codes or watermarks.

5. The apparatus of claim 1 , wherein the at least one processor is to:

after a non-detection of metadata in a portion of the media, extract a first signature from the portion of the media;

compare the first signature to a second signature; and

identify the portion of the media based on the comparison.

6. The apparatus of claim 1 , wherein the media monitoring information is first media monitoring information, and the at least one processor is to:

cause retrieval of second media monitoring information from a third database based on at least one of metering data, audit data, or census data;

perform a comparison of the first media monitoring information to the second media monitoring information; and

generate an alert to not report the first media monitoring information after a determination that at least a first portion of the first media monitoring information does not match at least a second portion of the second media monitoring information.

7. The apparatus of claim 6 , wherein the at least one processor is to:

execute a comparison of a first media presentation session duration and a second media presentation session duration, the first media presentation session duration based on the first media monitoring information, the second media presentation session duration based on the second media monitoring information; and

generate an alert to not report the first media monitoring information after a determination that the first media presentation session duration does not match the second media presentation session duration.

8. At least one non-transitory computer readable storage medium comprising instructions that, when executed, cause at least one processor to at least:

generate a first database based on storage of a first data association of a first media identifier and a first timestamp to a second media identifier in the first database, the first media identifier and the first timestamp based on media obtained from a server, the first media identifier and the second media identifier to identify the media, the second media identifier from the server;

generate a second database based on storage of a second data association of a third media identifier and a second timestamp in the second database, the third media identifier and the second timestamp based on media monitoring information obtained from the server, the media monitoring information obtained from the server after an access of the media by a media device, the third media identifier to identify the media accessed by the media device; and

credit access of the media to the media device based on a mapping of the third media identifier and the second timestamp from the second database to the first media identifier and the first timestamp in the first database, the mapping based on a determination that the third media identifier corresponds to the second media identifier.

9. The at least one non-transitory computer readable storage medium of claim 8 , wherein the mapping is a first mapping, and the instructions are to cause the at least one processor to perform a second mapping of the first media identifier and the first timestamp to the second media identifier in a look-up table in the first database.

10. The at least one non-transitory computer readable storage medium of claim 8 , wherein the instructions are to cause the at least one processor to:

detect metadata in a portion of the media; and

decode the metadata to generate an output representative of the first media identifier;

compare the first media identifier to the third media identifier; and

identify the portion of the media based on the comparison.

11. The at least one non-transitory computer readable storage medium of claim 8 , wherein the instructions are to cause the at least one processor to determine that the first media identifier and the second media identifier are codes or watermarks.

12. The at least one non-transitory computer readable storage medium of claim 8 , wherein the instructions are to cause the at least one processor to:

after a non-detection of metadata in a portion of the media, extract a first signature from the portion of the media;

compare the first signature to a second signature; and

identify the portion of the media based on the comparison.

13. The at least one non-transitory computer readable storage medium of claim 8 , wherein the media monitoring information is first media monitoring information, and the instructions are to cause the at least one processor to:

cause retrieval of second media monitoring information from a third database based on at least one of metering data, audit data, or census data;

output a comparison of the first media monitoring information to the second media monitoring information; and

cause display of an alert to not report the first media monitoring information after a determination that at least a first portion of the first media monitoring information does not match at least a second portion of the second media monitoring information.

14. The at least one non-transitory computer readable storage medium of claim 13 , wherein the instructions are to cause the at least one processor to:

execute a comparison of a first media presentation session duration and a second media presentation session duration, the first media presentation session duration based on the first media monitoring information, the second media presentation session duration based on the second media monitoring information; and

cause transmission of an alert to an electronic system to not report the first media monitoring information after a determination that the first media presentation session duration does not match the second media presentation session duration.

15. A method to monitor media, the method comprising:

generating a first database based on storage of a first data association of a first media identifier and a first timestamp to a second media identifier in the first database, the first media identifier and the first timestamp based on media obtained from a server, the first media identifier and the second media identifier to identify the media, the second media identifier from the server;

generating a second database based on storage of a second data association of a third media identifier and a second timestamp in the second database, the third media identifier and the second timestamp based on media monitoring information obtained from the server, the media monitoring information obtained from the server after an access of the media by a media device, the third media identifier to identify the media accessed by the media device; and

crediting access of the media to the media device based on a mapping of the third media identifier and the second timestamp from the second database to the first media identifier and the first timestamp in the first database, the mapping based on a determination that the third media identifier corresponds to the second media identifier.

16. The method of claim 15 , wherein the mapping is a first mapping, and the method further including performing a second mapping of the first media identifier and the first timestamp to the second media identifier in a look-up table in the first database.

17. The method of claim 15 , wherein the server is associated with a content publisher and the second media identifier is a publisher asset identifier that identifies the content publisher.

18. The method of claim 15 , further including:

detecting metadata in a portion of the media; and

decoding the metadata to generate an output representative of the first media identifier;

comparing the first media identifier to the third media identifier; and

identifying the portion of the media based on the comparison.

19. The method of claim 15 , further including:

after a non-detection of metadata in a portion of the media, extracting a first signature from the portion of the media;

comparing the first signature to a second signature; and

identifying the portion of the media based on the comparison.

20. The method of claim 15 , wherein the media monitoring information is first media monitoring information, and the method further including:

obtaining second media monitoring information from a third database based on at least one of metering data, audit data, or census data;

comparing the first media monitoring information to the second media monitoring information; and

generating an alert to not report the first media monitoring information after a determination that at least a first portion of the first media monitoring information does not match at least a second portion of the second media monitoring information.

21. The method of claim 20 , further including:

comparing a first media presentation session duration and a second media presentation session duration, the first media presentation session duration based on the first media monitoring information, the second media presentation session duration based on the second media monitoring information; and

generating an alert to not report the first media monitoring information after a determination that the first media presentation session duration does not match the second media presentation session duration.