Because digital media files are indexed by their true addresses, i.e. Numbers ID (Nid or Cid) of the file, the Asset Profile page is able to provide cross-network information and is not limited to any blockchain.
"Fork" badge of duplicates
The badge shows up in the top-left corner of a displayed asset when one of the following conditions is met:
A very similar asset has already been registered (in most cases, the differences can't be spotted by human eyes).
A parentAssetCid is identified in the AssetTree, signifying that the current asset is a derivative.
This badge is clickable and will direct the user to the asset profile of the previously registered asset.
This article further explains the details behind Asset Profile pages.