Use of Steganographically-Encoded Data as Basis to Control Dynamic Content Modification as to at Least One Modifiable-Content Segment Identified Based on Fingerprint Analysis

A method comprising:

• starting by a content presentation device to prepare for carrying out content modification with respect to a portion of media content on a channel being rendered by the content presentation device, wherein the starting is responsive to signaling from a server based on the server having determined through a fingerprint comparison that the portion of the media content is a particular modifiable-content segment;
• and
• before starting by the content presentation device to carry out the content modification, abandoning by the content presentation device the content modification, wherein the abandoning is responsive to further signaling from the server based on the server having determined based on watermark data encoded in media content of the channel that the portion of the media content is not the particular modifiable-content segment.