26 Onus of proof in proceedings (1) Where in the case of a literary, musical or artistic work or a computer program a name purporting to be that of the author appeared on copies of the said work or program as published or, in the case of an artistic work, appeared on the work when it was made, the person whose name so appeared shall, if it was his true name or a name by which he was commonly known, in any proceedings brought by virtue of this Chapter be presumed, unless the contrary is proved, to be the author of the work or program. (2) In the case of a work or program alleged to be a work or program of joint authorship, subsection (1) shall apply in relation to each person alleged to be one of the authors of the work or program as if references in that subsection to the author were references to one of the authors. (3) Where in any proceedings brought by virtue of this Chapter with respect to a literary, musical or artistic work or a computer program which is anonymous or pseudonymous it is established(a) that the work or program was first published in the Republic and was so published within the period of fifty years ending with the beginning of the calendar year in which the proceedings were brought; and (b) that a name purporting to be that of the publisher appeared on copies of the work or program as first published, then, unless the contrary is shown, copyright shall be presumed to subsist in the work or program and the person whose name so appeared shall be presumed to have been the owner of that copyright at the time of the publication: Provided that this subsection shall not apply if the actual name of the author of a pseudonymous work is commonly known. (4) Where in any proceedings brought by virtue of this Chapter with respect to a literary, musical or artistic work or a computer program it is proved or admitted that the author of the work or program is dead, the work or program shall be presumed to be an original work or program unless the contrary is proved. (5) Subsection (4) shall also apply where a work or program has been published and(a) the publication was anonymous or under a name alleged by the plaintiff or the State to be a pseudonym; and (b) it is not shown that the work or program has ever been published under the true name of the author or under a name by which he was commonly known or that it is possible for a person without previous knowledge of the facts to ascertain the Source: http://www.wipo.int/portal/es/