K.I.S.S.
Not actually referring to anyone as stupid! Thinking roll film (or digital) here, I have no experience with loose negs. I am inherently not a record keeper, so the less the better, AFAIC.
The purpose of filing and organizing is retrieval, not practicing databases. I have never needed to find neg 2008-02-08.01.23. But in my head, I know the image I want.
Our memories work best with some parallel information. Such as, what was the vacation, event, or significant point in time that will narrow it down. If you think to yourself, I want that shot of the old outhouse three holer seat (have one!), years later I know that was on a trip over Jones Pass, Colorado to Bearcat Creek. True, I do have three trips there, but even my feeble brain recalls I took it on the first one - which I did.
And if I couldn't recall? No big deal to hold a neg sheet to the light, or even better, glance at the contact sheet you made. ????? The image number is inconsequential until you have the strip in hand and am looking for it to print. But it's in front of you in a couple of seconds.
So, Mr. Smartypants, I shot twenty rolls at Bearcat Creek. Still no problem, because chances are you shot them over several days. Just put them in chrono order.
Out of thousands of images we may own, only a relative few deserve needing to access again. In digital, I just copy them to a "Best" folder. In film, a simple list in your folder drawer or 3 ring binder will do. Outhouse seat, Jones Creek, x-x-0x. Oh yeah. Flip the binder open, there's the contact sheet, there's the strip I need. And similar shots if I want something shot right about then.
Of course my system would probably freak out the structured types. But it works for me. And I spend very little time or effort cataloging, more time for shooting or beer.