Hidden surprises in the Bitcoin blockchain and how they are stored: Nelson Mandela, Wikileaks, photos, and Python software

Every Bitcoin transaction is stored in the distributed database known as the Bitcoin blockchain. However, people have found ways to hack the Bitcoin protocol to store more than just transactions. I've searched through the blockchain and found many strange and interesting things - from images to source code in JavaScript, Python, and Basic. If you're running a Bitcoin client, you probably have all this data stored on your system.

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