Yes, it is under copyright. However, I do not think there is anything wrong with posting a link to something at another site where copyrighted material is posted. If that were the case, there would be no Internet.
Another example is Albert E. Brumley wrote "I'll Fly Away" in 1929 and published it in 1932. If a person visits the Brumley website, a link exists for obtaining licensing information.
Dulcimer Players News published a version of "I'll Fly Away" in the Spring, 2012, DPN magazine and listed the version as "Public Domain" (but on the right side of the page at the top is printed the name of the composer Albert E. Brumley).
I know a person who published "I'll Fly Away" in her Bowed Psaltery book in 2012 and listed the song as "Traditional" with no credit to Albert.
Given the words "Public Domain" and "Traditional" in these two examples, it leaves me thinking people made assumptions with their publications.
If we search the internet on just the title we'll find "I'll Fly Away" lyrics, chords, videos, etc., in many places, which may be contributing to people thinking the song is traditional.
If I'm going to publish a tune or a song today in any form, I always check for copyright status first.
It wasn't my intent to cause controversy, I was only trying to raise awareness. I've seen so many people (and I've been one of them) using copyright material without being aware of the copyright status. For instance, many of us see requests for tablature for a modern song. Most people won't provide tablature if it is copyright (however, I saw some sharing of copyright material on one of the Facebook dulcimer groups before Christmas).
I usually try to guide people to a site that has the lyrics and chords as an alternative along with how they might transpose the chords to their dulcimer. It's not like they're going to fill a stadium full of fans and play the song some day for pay, but they would like to play it at home and/or among their friends or other small group gatherings. My concern is to make sure they know if a song is copyright so they don't play it someplace in public where the copyright police might choose to take issue (and/or sue). I think copyright conversations are always important and I'm thankful somebody informed me on a site like this in the past (maybe KenH or KenL ?).