1. Search the anchor ID to find out which platform the anchor broadcasts live.
2. Search the live broadcast notice or record of the anchor on social media to find out whether the anchor is broadcast live on which platform.
3. Search the name or live content of the anchor on each major live broadcast platform to find out whether the anchor is broadcast live on this platform.
It should be noted that some anchors may be broadcast live on multiple platforms, and detailed search and comparison are needed to determine which platform the anchor is broadcast live on.