yeah, both Kennedy and Santaolalla are quite active in the world music community. Though known to us for his scores, Gustavo is actually a performing musician first and foremost. He's actually involved with two bands. In addition he is also a music producer with his own record label. He's worked with many of the biggest groups in the world music scene. If there is a serious issue of plagiarism, this would come up by now. Santaolalla was actually touring in Europe at the same time that Kennedy performed that in Glasgow. If anyone has been to many world musician concerts, you know that they're often gathering of artist who just gather to play together, exploring mixing their music together. This could be the case. Just a theory.