<?xml version="1.0" encoding="UTF-8"?><oembed><type>video</type><version>1.0</version><html>&lt;iframe src=&quot;https://www.loom.com/embed/528532f65603435eb1f4f4e8a776c220&quot; frameborder=&quot;0&quot; width=&quot;1110&quot; height=&quot;832&quot; webkitallowfullscreen mozallowfullscreen allowfullscreen&gt;&lt;/iframe&gt;</html><height>832</height><width>1110</width><provider_name>Loom</provider_name><provider_url>https://www.loom.com</provider_url><thumbnail_height>832</thumbnail_height><thumbnail_width>1110</thumbnail_width><thumbnail_url>https://cdn.loom.com/sessions/thumbnails/528532f65603435eb1f4f4e8a776c220-cf6f6aa819e6a190.gif</thumbnail_url><duration>150.0218</duration><title>ETHDenver 2025: Demo of Optimism Multi-Chain Attestations</title><description>In this video, I’m demonstrating the Optimism Track Multi-Shane Attestations using my local setup. I’ll walk you through connecting my wallet, creating a test attestation, and how the smart contracts interact across different chains. I’ve deployed my contracts on chains 901 and 902, and I’ll show you the code and the process involved. Please take a look and let me know if you have any questions or need further clarification on any part of the demo.</description></oembed>