The phrase "a watermark of" is correct and usable in written English.
It can be used to indicate a distinguishing feature or characteristic that is inherent to something, often implying authenticity or quality.
Example: "The artist's unique style is a watermark of her work, making it easily recognizable."
Alternatives: "a hallmark of" or "a signature of".
Foolscap paper is so called because, in the 15th century, paper of that size had a watermark of a jester's cap.
His name has always been a watermark of quality, and of particular qualities, for any recording he's taken part in, as leader or sideman.
Understanding a narrator's subjectivity is a watermark of cutting edge oral history, and its distance ideologically from past oral history practices is important.
"The O. J. Simpson case was a watermark of sorts for focusing the public's attention on DNA testing," said Mr. Goddard.
A former C.I.A. field officer, on the other hand, says the problem is that "a watermark of incompetence runs through the intelligence communities".
"My initial reaction was, I'm never blogging again," Mrs. White said, but decided instead to brand all her pictures with a watermark of her blog's URL, an increasingly common tactic for mommy bloggers.
Even the horrid name, 'HateNation', in block capitals as a watermark on all of its depressingly toothsome videos, is indicative of our collective desire to watch things burn.
You can make a watermark out of either a picture (graphic) or text.
It is vital that you add a watermark to each of your drawings so that no one can take it and claim it as theirs.
In 1994, he joined the NEC Research Center in Princeton, N.J., where he worked with a colleague on software that applied the equivalent of a watermark to digital pictures.
"I love that people think it's a good story, but I don't understand how it's different," she said in an interview Friday, in a voice with a faint watermark of Southern drawl.
