A hundredth re-read of the LotR

[Gordis]

Originally Posted by Ibrîniðilpathânezel

How the Ring verse got into Elven lore is no real puzzle at all, I think. .. How they heard it, or if only those who owned the Three heard it, is perhaps the only real puzzle. That and where Sauron learned how to make such nice poetry (though if he could invent the Black Speech, one might suppose that he if no one else could write poems in it ).

There is no puzzle indeed. The Elves of Eregion who wore the Rings at the moment when Sauron made the Ring-spell (SA 1600) heard it - and took the Rings off, never to wear again in the Second Age.
All the Rings were made for Elves: the 9 the 7 and the 3 alike. (The plan to give them to different reces was Sauron's alone). The Seven were all distributed among the Elves by the time Sauron attacked Eregion (SA 1695). The Nine not yet - they were still kept in the House of the Mirdain. The data are from UT "History of Galadriel and Celeborn"
Thus I believe in 1600, when the One Ring was made, at least 10 of the Mirdain heard Sauron's spell.