What would you check after a large-scale URL migration?

1. old URLs return correct redirects;
2. redirects point directly to final URLs;
3. new URLs return 200;
4. canonicals point to new URLs;
5. internal links use new URLs;
6. XML sitemaps contain new URLs;
7. robots.txt doesn't block new URLs;
8. hreflang references are updated;
9. structured data uses correct URLs;
10. Search Console reports are monitored.

Google recommends preparing a URL mapping, implementing redirects, testing before launch and monitoring after migration.