Notify podcast aggregators of an RSS feed update in real time via Podping instead of polling

Steps

1. Have your hosting platform or publishing tool send a plain HTTP GET request containing the updated feed's URL to a Podping.cloud endpoint whenever the RSS feed changes or a new episode posts.
2. Podping.cloud validates the publisher's identity, then writes the feed URL plus associated "reason" and "medium" codes as a custom JSON object onto the Hive blockchain (new block roughly every 3 seconds).
3. Aggregators/apps watch the Hive blockchain (via a hivewriter/hivewatcher client — available for Python, Rust, and JS) instead of polling each feed individually, picking up the change within about 20 seconds.
4. On restart, a watcher can resume a few hundred blocks back so it doesn't miss notifications that occurred while offline.
5. Optionally declare in the feed itself that it uses Podping by adding a <podcast:podping usesPodping="true"/> element as a child of <channel>, so directories know they can poll it less frequently.