A global enterprise is distributing shared software artifacts to accounts in multiple Regions. Releases must remain traceable to tested immutable versions. Which approach is most appropriate?

1. Rebuild from floating dependencies separately in every target account.
2. Use the release filename alone as proof that every copied artifact is identical.
3. Overwrite one latest object independently in every Region after deployment begins.
4. Use versioned artifacts and recorded checksums or version identifiers, with controlled replication and access.