🤔 Perhaps a certification "✅ label or symbolic ⊕ label in OP_RETURN" or direct from the outset in the meta descriptions of the files? As a trace of the origin. But this system would have to be generalised to be very efficient? Can even be incremented in parallel via the ecdsa on the blockchain. A commercial name for this process could sound like: VERYDATA.
I think adding a message like this one (linked) splits it, so good learning for next time... lets continue when you have moved it to the main one (will delete this one then)... 😉