Artist-centric royalties: restricted diagonal reweighting, manipulation, and incidence

Artist-centric royalties weight announced play categories before a fixed pool is divided. This common-cell restriction limits arbitrary recording-specific ex-post allocations. We derive recording and owner incidence, redistribution bounds, and category-weight effects. With imperfect screening, a lower retained weight weakly reduces effective artificial claims in partial equilibrium, but not necessarily attempts or social cost. An unrestricted user-indexed representation nests user-centric payment; the common-cell artist-centric class generally does not. These are same-stream counterfactuals, not welfare or adoption claims.