It is a shortened version of ~지요

~지요 = ㅈ + ㅣ + 요

~지요 = ~죠

숀은 미혼이지요? = 숀은 미혼이죠? = Is Sean single?

http://bit.ly/2DQygK8

미혼 = single (adjective)

기혼 = married (adjective)

Shorted versions are often used in songs for example:

https://youtu.be/xCCBWQS81nM

그댈 사랑해요 = 그대를 사랑해요 = I love you.

그댈 is a shortened version of 그대를

그대를 = 그댈 = 너를 = 당신을

그대 = 너 (polite, romantic & poetic version of you)

https://youtu.be/_wT5oSYj86Y

Also, the much better Korean sentence for "Wasn't it cloudy?" is "날씨가 흐렸죠?" rather than "흐렸죠?"

https://youtu.be/q9JxXJewpvI

Short answer would be the equivalent of

"..., isn't it?"

sentences in English. And yes, contraction of 지요.