Abstract: In one aspect, a method includes identifying a group of multiple content-presentation devices that are tuned to the same channel and that are each scheduled to perform, at a modification start-time, a respective content-modification operation that comprises modifying a modifiable content-segment in connection with an upcoming content-modification opportunity on the channel. The method also includes determining that, after the modification start-time, at least a subgroup of the group of content-presentation devices have detected a mismatch between reference fingerprint data representing the modifiable content-segment and query fingerprint data representing content received by at least the subgroup of content-presentation devices.

Abstract: In one aspect, a method includes receiving a first request for first supplemental content for use by a content-presentation device in performing a first content-modification operation, receiving a second request for second supplemental content for use by a tuner device in performing a second content-modification operation. The method also includes determining that the content-presentation device is connected to the tuner device, and based at least in part on the first and second requests, determining that the first and second requests are associated with the same modifiable content-segment, and, in response to the determinations, using one or more parameters as a basis to select for performance an action from a set of actions including a first action that facilitates performance of the first content-modification operation and a second action that facilitates performance of the second content-modification operation.

Abstract: In one aspect, a method includes identifying a group of multiple content-presentation devices that are tuned to the same channel and that are each scheduled to perform, at a modification start-time, a respective content-modification operation that comprises modifying a modifiable content-segment in connection with an upcoming content-modification opportunity on the channel. The method also includes determining that, after the modification start-time, at least a subgroup of the group of content-presentation devices have detected a mismatch between reference fingerprint data representing the modifiable content-segment and query fingerprint data representing content received by at least the subgroup of content-presentation devices.

Abstract: In one aspect, a method is performed by a computing system that is in communication with a content-presentation device, where the content-presentation device is scheduled to perform, at a modification start-time, a content-modification operation that comprises modifying a modifiable content-segment that the content-presentation device is scheduled to receive. The method includes determining that the content-presentation device has detected, within a predefined time period after the modification start-time and during performance of the content-modification operation, a mismatch between reference fingerprint data representing the modifiable content-segment and query fingerprint data representing content received by the content-presentation device from a tuner device connected to the content-presentation device.

Abstract: In one aspect, a method includes identifying a group of multiple content-presentation devices that are tuned to the same channel and that are each scheduled to perform, at a modification start-time, a respective content-modification operation that comprises modifying a modifiable content-segment in connection with an upcoming content-modification opportunity on the channel. The method also includes determining that, after the modification start-time, at least a subgroup of the group of content-presentation devices have detected a mismatch between reference fingerprint data representing the modifiable content-segment and query fingerprint data representing content received by at least the subgroup of content-presentation devices.

Abstract: In one aspect, a method is performed by a computing system that is in communication with a content-presentation device, where the content-presentation device is scheduled to perform, at a modification start-time, a content-modification operation that comprises modifying a modifiable content-segment that the content-presentation device is scheduled to receive. The method includes determining that the content-presentation device has detected, within a predefined time period after the modification start-time and during performance of the content-modification operation, a mismatch between reference fingerprint data representing the modifiable content-segment and query fingerprint data representing content received by the content-presentation device from a tuner device connected to the content-presentation device.

Abstract: In one aspect, a method includes receiving a first request for first supplemental content for use by a content-presentation device in performing a first content-modification operation, receiving a second request for second supplemental content for use by a tuner device in performing a second content-modification operation. The method also includes determining that the content-presentation device is connected to the tuner device, and based at least in part on the first and second requests, determining that the first and second requests are associated with the same modifiable content-segment, and, in response to the determinations, using one or more parameters as a basis to select for performance an action from a set of actions including a first action that facilitates performance of the first content-modification operation and a second action that facilitates performance of the second content-modification operation.

Abstract: In one aspect, a method is performed by a content-presentation device that is scheduled to perform, at a modification start-time, a content-modification operation that comprises modifying a modifiable content-segment that the content-presentation device is scheduled to receive. The method includes receiving reference fingerprint data representing the modifiable content-segment. The method also includes making a comparison of the reference fingerprint data with query fingerprint data representing content received by the content-presentation device from a tuner device connected to the content-presentation device. The method also includes based on the comparison, detecting, within a predefined time period after the modification start-time and during performance of the content-modification operation, a mismatch between the reference fingerprint data and the query fingerprint data.

Abstract: In one aspect, a method includes receiving a first request for first supplemental content for use by a content-presentation device in performing a first content-modification operation, receiving a second request for second supplemental content for use by a tuner device in performing a second content-modification operation. The method also includes determining that the content-presentation device is connected to the tuner device, and based at least in part on the first and second requests, determining that the first and second requests are associated with the same modifiable content-segment, and, in response to the determinations, using one or more parameters as a basis to select for performance an action from a set of actions including a first action that facilitates performance of the first content-modification operation and a second action that facilitates performance of the second content-modification operation.

Abstract: In one aspect, a method is performed by a computing system that is in communication with a content-presentation device, where the content-presentation device is scheduled to perform, at a modification start-time, a content-modification operation that comprises modifying a modifiable content-segment that the content-presentation device is scheduled to receive. The method includes determining that the content-presentation device has detected, within a predefined time period after the modification start-time and during performance of the content-modification operation, a mismatch between reference fingerprint data representing the modifiable content-segment and query fingerprint data representing content received by the content-presentation device from a tuner device connected to the content-presentation device.

Abstract: In one aspect, a method is performed by a content-presentation device that is scheduled to perform, at a modification start-time, a content-modification operation that comprises modifying a modifiable content-segment that the content-presentation device is scheduled to receive. The method includes receiving reference fingerprint data representing the modifiable content-segment. The method also includes making a comparison of the reference fingerprint data with query fingerprint data representing content received by the content-presentation device from a tuner device connected to the content-presentation device. The method also includes based on the comparison, detecting, within a predefined time period after the modification start-time and during performance of the content-modification operation, a mismatch between the reference fingerprint data and the query fingerprint data.

Abstract: In one aspect, a method includes identifying a group of multiple content-presentation devices that are tuned to the same channel and that are each scheduled to perform, at a modification start-time, a respective content-modification operation that comprises modifying a modifiable content-segment in connection with an upcoming content-modification opportunity on the channel. The method also includes determining that, after the modification start-time, at least a subgroup of the group of content-presentation devices have detected a mismatch between reference fingerprint data representing the modifiable content-segment and query fingerprint data representing content received by at least the subgroup of content-presentation devices.