Star Trek: The Original Series trivia question: Is there ever any canonical indication about whether or not it's public knowledge that Flint was half of the most important people in Earth history?

Like, assuming all of the evidence we see onscreen is authentic, and implies what it seems to imply, Flint was Brahms-the-composer. When I was well enough to be anything, I was a pianist from a classical training background, so I know that entry-level music history and musicology often presents Bach, Beethoven, and Brahms as the keystone composers of the three successive divisions of the common practice period: the Baroque period, the Classical period, and the Romantic period (which is a little silly for reasons that I'd look like a dick if I got into).

One possibility is that Flint was always Brahms — that there was never a separate individual named Johannes Brahms — but this seems problematic because it's implied that for the period during which Flint was immortal, he looked the same as he had when he became immortal, circa 3800 BCE, at which point he was in his mid-30s, while documentary attestation of Brahms' career started in his teens, and there's no textual evidence that Flint can change his shape. Given that, another possibility is that there was a real historical Brahms but that Flint replaced him at some point.

Whatever the case, onscreen evidence suggests that Flint was Brahms full-time by 1865 — the waltz that Spock plays is suggested to be a lost "seventeenth" of Brahms' 16 Waltzes, Op. 39, which were published in that year. The thing is, that means Flint is responsible for, at minimum, basically all of Brahms' mature and late works — in my opinion, everything Brahms is actually known for.

How would that impact Federation music historians and musicologists? How do you analyse Brahms in the context of German late Romanticism when you know he's actually an ancient Sumerian? Do his early works count as neo-Baroque/neo-Renaissance if you know he actually lived through the era in question? Can't be a "revivalist" of something which has literally never died