Apparatus and methods to associate different watermarks detected in media

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:
• detecting a first watermark corresponding to a first media presentation;
• associating the first watermark with an ongoing media presentation record in a watermark data structure when the ongoing media presentation record corresponds to the first media presentation;
• detecting a second watermark;
• determining that the second watermark corresponds to a second media presentation different than the first media presentation;
• updating, based on the determining, the ongoing media presentation record in the watermark data structure to end at a time corresponding to the first watermark being detected to form a previously-presented media presentation record;
• generating, based on the determining, a new ongoing media presentation record associated with the second media presentation and the second watermark;
• and
• starting a bridge timer for the new ongoing media presentation record,
• wherein the bridge timer tracks a bridge time which corresponds to a duration of time since the detecting of the second watermark, and
• wherein the bridge timer is used to determine when the new ongoing media presentation record ends.

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:

• detecting a first watermark corresponding to a first media presentation;
• associating the first watermark with an ongoing media presentation record in a watermark data structure when the ongoing media presentation record corresponds to the first media presentation;
• detecting a second watermark;
• determining that the second watermark corresponds to a second media presentation different than the first media presentation;
• updating, based on the determining, the ongoing media presentation record in the watermark data structure to end at a time corresponding to the first watermark being detected to form a previously-presented media presentation record;
• generating, based on the determining, a new ongoing media presentation record associated with the second media presentation and the second watermark;
• and
• starting a bridge timer for the new ongoing media presentation record,
• wherein the bridge timer tracks a bridge time which corresponds to a duration of time since the detecting of the second watermark, and
• wherein the bridge timer is used to determine when the new ongoing media presentation record ends.