Duchamp was the original DJ. The whole readymade thing strikes me as a precursor to the sampling & quoting of music. Interesting also that a) Duchamp signed the fountain with a fictional name, and signed other readymades with “from M. Duchamp” rather than “by”; b) he did not consider the works to be art; that c) there were no “originals”:
Duchamp states that, “another aspect of the “readymade” is its lack of uniqueness… the replica of a “readymade” delivering the same message; in fact nearly everyone of the “readymades” existing today is not an original in the conventional sense.” This statement was made late in Duchamp’s life, showing that he was not upset that his originals had been lost, in fact it is believed that he disposed of many of them himself.
and d) there were no issues at the time related to patent, trademark or copyright. The urinal manufacturer does not seem to have gotten upset. Which is clearly not the case today, or efforts like this or that would not be needed. Free the Mouse!