Content-modification system with transmission delay-based feature

A non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by a processor, cause performance of a set of operations comprising:

• receiving query fingerprint data representing content received by a content-presentation device;
• determining a content-transmission delay between a content-distribution system and the content-presentation device;
• selecting, based at least on the determined content-transmission delay, and from among a plurality of reference fingerprint data sets, a reference fingerprint data set that mapping data maps to the determined content-transmission delay;
• detecting a match between the query fingerprint data and at least a portion of reference fingerprint data in the selected reference fingerprint data set, wherein the at least a portion of reference fingerprint data in the selected reference fingerprint data set corresponds with a channel;
• based on the match, identifying the channel as being one on which the content-presentation device is receiving content;
• and
• responsive to detecting the match, causing the content-presentation device to perform a content-modification operation in connection with a content-modification opportunity identified on the identified channel.

A computing system comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by the processor, cause performance of a set of operations comprising:
• receiving query fingerprint data representing content received by a content-presentation device;
• determining a content-transmission delay between a content-distribution system and the content-presentation device;
• selecting, based at least on the determined content-transmission delay, and from among a plurality of reference fingerprint data sets, a reference fingerprint data set that mapping data maps to the determined content-transmission delay;
• detecting a match between the query fingerprint data and at least a portion of reference fingerprint data in the selected reference fingerprint data set, wherein the at least a portion of reference fingerprint data in the selected reference fingerprint data set corresponds with a channel;
• based on the match, identifying the channel as being one on which the content-presentation device is receiving content;
• and
• responsive to detecting the match, causing the content-presentation device to perform a content-modification operation in connection with a content-modification opportunity identified on the identified channel.