The issue here isn't (just) adulteration, it's that watermarking in general is unworkable.
If all the providers use watermarking systems with different shifting logit weightings, and the keys are secret, you have to check every provider to see if it produced a given text.
Which is clearly ridiculous.
And if all providers collaborate and use the same weightings, or if the weightings are constant and not rotated cryptographically, a generic watermark remover becomes trivial.
That's not even getting into the legal complexities of businesses running open source models without watermarking locally.
> Interoperability. Providers must implement an interoperability solution for watermark detection such as a standardized API access method, a publicly readable signpost mechanism embedded in content, or participation in a consortium detection solution by February 2, 2027
No idea why this was flagged to death. I vouched for it because it is a direct quote from the AI transparency act: https://theaicounsel.net/wp-content/uploads/2026/07/07_26_co... It clarifies interoperability requirements.