Blossom Media Server for direct file upload on zPay.live

I recently learned about the Blossom Media Server, though I haven’t deployed or integrated it yet. I have a question:

If I understand correctly, it offers two upload options: one encrypted and one unencrypted, which is publicly shareable. Can someone access the unencrypted, publicly shareable content without its unique URL? 

 nostr:nprofile1qqszv6q4uryjzr06xfxxew34wwc5hmjfmfpqn229d72gfegsdn2q3fgpz9mhxue69uhkummnw3ezuamfdejj7qgjwaehxw309ahx7um5wf6k2tnrdakj7qg6waehxw309ac8junpd45kgtnxd9shg6npvchxxmmd9usc5pxf the better guy to ask, I don't know the full ins and outs