Via Patry, Albrecht Dürer’s idea of a copyright notice:
Hold! You crafty ones, strangers to work, and pilferers of other men’s brains. Think not rashly to lay your thievish hands upon my works. Beware! Know you not that I have a grant from the most glorious Emperor Maximillian, that not one throughout the imperial dominion shall be allowed to print or sell fictitious imitations of these engravings? Listen! And bear in mind that if you do so, through spite or through covetousness, not only will your goods be confiscated, but your bodies also placed in mortal danger.
But that to my mind still doesn’t have quite the stinging crazyjuice of this copyright warning specifically for Jews in Venice, circa 1623:
We have agreed to the reasonable and proper request of the worthy and honored Master Salamon Rossi of Mantua (may his Rock keep and save him) who has become by his painstaking labors the first man to print Hebrew music. He has laid out a large disbursement which has not been provided for, and it is not proper that anyone should harm him by reprinting similar copies or purchasing them from a source other than himself. Therefore, having seen the license granted by His Excellence, the Cattavero (may his glory by exalted), we the undersigned decree by the authority of the angels and the world of the holy ones, invoking the curse of the serpent’s bite, that no Israelite, wherever he may be, may print the music contained in this work in any manner, in whole or in part, without the permission of the above-mentioned author or his heirs for a period of fifteen years from this date. Nor is any Jew permitted under the terms of this decree to buy from any person, whether he be of our nation or not, any of these works without the permission of the above-mentioned author, who is to indicate by some special mark that he has consented to their sale by another party. Let every Israelite hearken and stand in fear of being entrapped by this ban and curse. And those who hearken will dwell in confidence and ease, abiding in blessing under the shelter of the Almighty. Amen.
Seriously, the curse of the serpent’s bite sounds like the baddest-ass DRM evar.