Osa.cz is tracked by us since April, 2011. Over the time it has been ranked as high as 519 299 in the world, while most of its traffic comes from Czech Republic, where it reached as high as 5 100 position. It was owned by several entities, from OSA - Ochranný svaz autorský pro práva k dílům hudebním o.s. admin-c: JTICHYOSA to OSA - Ochranný svaz autorský pro práva k dílům hudebním z.s. of OSA - Ochranný svaz autorský pro práva k dílům hudebním z.s., it was hosted by Master Internet s.r.o, ACTIVE 24 network and others. While REG-INTERNET-CZ was its first registrar, now it is moved to CZ-NIC.

Osa has a high Google pagerank and bad results in terms of Yandex topical citation index. We found that Osa.cz is poorly ‘socialized’ in respect to any social network. According to MyWot and Google safe browsing analytics, Osa.cz is a suspicious domain with mostly negative visitor reviews.