Content-modification system with fingerprint data mismatch and responsive action 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 on a channel that is unidentified to a fingerprint-matching server;
• making a first comparison of at least a first portion of the received query fingerprint data with at least one first reference fingerprint data set of a plurality of first reference fingerprint data sets, wherein each of the plurality of first reference fingerprint data sets corresponds with a respective known channel identifier and is generated by a content-distribution system from which the content-presentation device receives the content on the unidentified channel;
• based on the first comparison, determining that the received query fingerprint data does not match any of the at least one first reference fingerprint data sets;
• responsive to the determining;
• determining that the channel on which the content-presentation device is receiving the content is an unidentified channel, and
• making a second comparison of at least a second portion of the received query fingerprint data with second reference fingerprint data representing a modifiable content-segment, wherein the second reference fingerprint data is different from the plurality of first reference fingerprint data sets that correspond with the known channel identifiers and is generated by a computing system different from the content-distribution system;
• based on the second comparison, detecting a match between at least the second portion of the received query fingerprint data and the second reference fingerprint data;
• and
• responsive to detecting the match;
• determining that the content received by the content-presentation device on the unidentified channel includes the modifiable content-segment, and
• performing an action that facilitates the content-presentation device performing a content-modification operation so as to output supplemental content on the unidentified 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 on a channel that is unidentified to a fingerprint-matching server;
• making a first comparison of at least a first portion of the received query fingerprint data with at least one first reference fingerprint data set of a plurality of first reference fingerprint data sets, wherein each of the plurality of first reference fingerprint data sets corresponds with a respective known channel identifier and is generated by a content-distribution system from which the content-presentation device received the content on the unidentified channel;
• based on the first comparison, determining that the received query fingerprint data does not match any of the at least one first reference fingerprint data sets;
• responsive to the determining;
• determining that the channel on which the content-presentation device is receiving the content is an unidentified channel, and
• making a second comparison of at least a second portion of the received query fingerprint data with second reference fingerprint data representing a modifiable content-segment, wherein the second reference fingerprint data is different from the plurality of first reference fingerprint data sets that correspond with the known channel identifiers and is generated by a computing system different from the content-distribution system;
• based on the second comparison, detecting a match between at least the second portion of the received query fingerprint data and the second reference fingerprint data;
• and
• responsive to detecting the match;
• determining that the content received by the content-presentation device on the unidentified channel includes the modifiable content-segment, and
• performing an action that facilitates the content-presentation device performing a content-modification operation so as to output supplemental content on the unidentified channel.