Dish Network has signed up Sling TV to be the inaugural streaming TV customer of comScore’s new cross-platform addressable measurement service. comScore is measuring addressable advertising campaigns across Dish Network’s set tops and DVRs; and viewership on Sling TV’s OTT platform will now be folded into those results to give advertisers a more complete picture of audience reach and campaign performance. That makes Dish one of the first service providers to offer addressable advertising measurement across digital and linear. The advent of addressable advertising was supposed to bridge the worlds of linear TV advertising with digital targeting, as addressable advertising enables marketers to target TV ads to viewers like they would on digital platforms. But addressable advertising – which is…