Media channel identification and action, with disambiguation through client-side fingerprint matching of channel-specific icon

A system comprising:

• a network communication interface;
• a processing unit;
• non-transitory data storage;
• and
• program instructions stored in the non-transitory data storage and executable by the processing unit to carry out operations including:
• detecting that a query fingerprint matches multiple instances of reference fingerprints each representing frames of a respective channel in multiple channels of video content being rendered by a media presentation device, and
• responsive to at least the detecting that the query fingerprint matches the reference fingerprints, configuring the media presentation device with channel-icon fingerprint data, wherein the channel-icon fingerprint data includes multiple reference channel-icon fingerprints each representing a channel icon of a respective channel in the multiple channels, and multiple indications each representing an in-frame region of a respective channel in the multiple channels at which the respective channel presents the channel icon specific to the respective channel, to enable the media presentation device to perform channel-icon fingerprint matching to determine which channel of the multiple channels is being rendered by the media presentation device.