plagiarising their work
... that according to the U.S. copyright law, musicians who accuse others of plagiarising their work must prove "access" and "similarity", in the absence of a confession?
... that according to the <a class="mw-redirect" href="./U.S._copyright_law" id="mwA9o" rel="mw:WikiLink" title="U.S. copyright law">U.S. copyright law</a>, musicians who accuse others of <b id="mwA9s"><a class="mw-redirect" href="./Musical_plagiarism" id="mwA9w" rel="mw:WikiLink" title="Musical plagiarism">plagiarising their work</a></b> must prove "access" and "similarity", in the absence of a confession?