When I made my CD I was fine with the one song on it, which was written and performed by the chap who made the CD with me.   I also knew that the tune "Snowy Path" was written by Mark Kelly of Altan. Things got a bit fuzzy with the Shetland reel "Barrowburn Reel," which I found, by googling, and to my surprise, was composed by Addie Harper. Things got even fuzzier with the tune "City of Savannah" which I found had been attributed to one Frank Livingstone, about whom I could discover very little. I registered my recording with MCPS and an excellent fellow called Hans Fried got on my case. I informed him of my findings and left the rest to him. I was satisfied that I'd done all I could to track down any copyright issues.