To the extent possible under law, Ura Design has waived all copyright and related or neighboring rights to OpenChain Penguin Illustrations via the CC0 waiver, releasing the work under Public Domain. The OpenChain logo is available under following Terms of Use: https://www.openchainproject.org/terms Credits are optional, but appreciated: Illustrator: Raphael Eckhardt ( http://raphaeleckhardt.com/ ) Layout: Ura Design ( https://ura.design )