Was talking to my partner about this and she had a pretty clever take:
"Seems like a simple idea would simply be to change just the spelling of one seemingly insignificant name near the end of each version of the credits and then by actually watching the credits you'd know the leaker straight away."
"Of course, you'd leave the watermark on there so the leaker doesn't know how you caught them and thinks that the watermark is still the tracking mechanism."
"Seems like a simple idea would simply be to change just the spelling of one seemingly insignificant name near the end of each version of the credits and then by actually watching the credits you'd know the leaker straight away."
"Of course, you'd leave the watermark on there so the leaker doesn't know how you caught them and thinks that the watermark is still the tracking mechanism."