Who
Who certifies, and from when
The Korea Popmusic Industry Association (한국대중음악산업협회), the organisation behind Circle Chart (써클차트), certifies works that appear on Circle Chart. For works released from January 1, 2018 onward, if their accumulated sales pass a set number, the association certifies them and announces it on Circle Chart. Nothing released before that date is eligible.1
Albums
What counts as an album
Albums released in Korea qualify, whether domestic or foreign (the page says "domestic licensed albums"), and the count is the sales volume of a single album, in the same medium, with the same tracklist. An album is certified only once six weeks have passed since its release. Two thresholds apply: Platinum at 250,000 copies and Million at 1,000,000.1
Songs
Streaming and download songs
For songs, online on-demand streaming and download music released from January 1, 2018 qualifies, and a song is eligible from its release date, with no waiting period. Downloads are certified at Platinum (2,500,000) and Diamond (10,000,000), and streams at Platinum (100,000,000) and Billion (1,000,000,000).1
Excluded
What is left out
Three categories are excluded from certification: overseas licensed albums, not-for-sale albums and free promotion music.1
Versions
Why versions matter
Because an album's count is "the same medium with the same tracklist", a version with a different tracklist or medium is a different album for certification purposes on the page's wording. Circle's own half-year album chart also lists versions separately: in DabPop's first-half 2026 table, CORTIS's GREENGREEN appears twice.12
Reading numbers
A chart total is not a certification
In that table, 11 of the 25 entries are above 1,000,000 copies (a count DabPop made from the table). But a certification measures one album's accumulated sales since release, after the six-week wait, while the table covers six months of one chart, so the two should not be read as the same thing.2