Methods and systems for determining a latency between a source and an alternative feed of the source

A non-transitory computer readable medium having stored thereon instructions, that when executed by one or more processors, cause the one or more processors to perform functions comprising:

• receiving queries from devices, wherein the queries include respective samples of content from a stream of content rendered by a source;
• receiving samples of content from a stream of content rendered by an alternative feed of the source;
• for each sample of content from the alternative feed of the source, identifying respective matching queries that match to the same content as the sample of content from the alternative feed of the source;
• for each respective matching query, determining a respective relative time difference between a time that the content appears in the sample of content from the alternative feed and a time that the content appears in the respective matching query;
• and
• based, at least in part, on the determined respective relative time differences, determining an identity of the alternative feed of the source.

A system comprising:

• one or more processors;
• and
• non-transitory computer readable medium storing instructions, that when executed by the one or more processors, causes the one or more processors to perform functions comprising:
• receiving queries from devices, wherein the queries include respective samples of content from a stream of content rendered by a source;
• receiving samples of content from a stream of content rendered by an alternative feed of the source;
• for each sample of content from the alternative feed of the source, identifying respective matching queries that match to the same content as the sample of content from the alternative feed of the source;
• for each respective matching query, determining a respective relative time difference between a time that the content appears in the sample of content from the alternative feed and a time that the content appears in the respective matching query;
• and
• based, at least in part, on the determined respective relative time differences, determining an identity of the alternative feed of the source.