Sidechains

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@@ -15,6 +15,7 @@ Public summaries of some wizardly thinking:
 <li><a href="https://download.wpsoftware.net/bitcoin/wizardry/brs-arbitrary-output-sizes.txt">Output size obfuscation for Bytecoin</a></li>
 <li><a href="https://iwilcox.me.uk/2014/no-from-address">There Is No 'From' Address</a>
 <li><a href="https://iwilcox.me.uk/2014/proving-bitcoin-reserves">Proving Your Bitcoin Reserves</a>
+<li><a href="http://blockstream.com/sidechains.pdf">Sidechains</a>
 </ul>
 
 Useful resources: