If you wrote it on paper, whether musical notation or just the lyrics, that would give you songwriter copyright.
If you then gave a performance and someone recorded it, the copyright in the recording would lie with them - but they would not be able to distribute it without also having your permission.
(People forget that these are different and the songwriter royalties are quite lucrative - famously e.g. the Beatles almost all the songs are joint copyright Lennon/McCartney, not the band as a whole)
If you then gave a performance and someone recorded it, the copyright in the recording would lie with them - but they would not be able to distribute it without also having your permission.
(People forget that these are different and the songwriter royalties are quite lucrative - famously e.g. the Beatles almost all the songs are joint copyright Lennon/McCartney, not the band as a whole)