What does Check Mark look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add Check Mark?

HTC first drew Check Mark in Sense 7, released March 30, 2015.

HTC Corporation has shipped 2 versions of Check Mark. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn Check Mark 2 times. Every revision HTC has shipped is below, newest first.

What does Check Mark look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add Check Mark?: HTC first drew Check Mark in Sense 7, released March 30, 2015.
How many times has HTC redrawn Check Mark?: HTC Corporation has shipped 2 versions of Check Mark. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.