I believe there was discussion of legacy splits on the Ablekraft podcast a few years back, but my memory is fuzzy. For media, this is definitely already possible via RSS and the Podcasting 2.0 protocol but only IF the creator of later works WANTS to honor the OGs...and if the OGs included the info for them to copy! You can see the person tags with credited roles in many self-hosted music albums, so if a sample or beat gets pulled, their value tag(s) could be copied over and given a split. However, this of course falls under v4v and the honor system...but in my opinion, that's the way it should be. I'd love to see splits adopted into all mediums. Nice to know where your value flows.