A monthly Top-100 of artists for every country three public charts cover. No weights, no identity layer, no editorial input.
Three charts a day. Apple Music Top 100 songs per storefront (165 countries), YouTube most popular music videos per region (111), Deezer «Top Country» playlist (69). Raw responses are kept.
Artist as given. One splitting rule: «feat.», «&», comma, «x» — every named artist gets the position's full points. A short exceptions list protects names like Simon & Garfunkel. Matching across charts is by normalised name.
Points. A chart position at rank r is worth 1/√r: #1 = 1.00, #10 = 0.32, #100 = 0.10.
Month. For each chart and country, an artist's points over the month are divided by the total of all artists — a share. A 30-video chart and a 100-song chart weigh the same.
Country score. The mean of the artist's shares over the charts present in that country. Leader = 100. Each row shows in how many charts the artist appears; each country shows how many charts it has.
Chart data belongs to its publishers. This is a test stand.