| CPC G06F 16/683 (2019.01) [G11B 27/034 (2013.01); G11B 27/105 (2013.01); H04N 9/8042 (2013.01)] | 20 Claims |

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1. A computer program product comprising a non-transitory computer readable storage medium retaining program instructions, which program instructions when read by a processor, cause the processor to:
obtain a media sample of a media stream;
retrieve from a database a media record that matches the media sample of the media stream;
align the media record with the media stream, wherein aligning the media record comprises determining an offset from a start of the media record;
compare the media stream with the media record according to the offset; and
upon identifying a semantic deviation between the media stream and the media record, determine that the media stream is semantically manipulated.
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