アップビットとビッサム、BIRBのKRW建て取引ペアを上場

The assessment is "likely_true" because the only sources that directly and explicitly address the claim confirm it. Two sources, a post on X and a personal crypto news dashboard, both with perfect relevance, state that Moonbird (BIRB) has been newly listed on the KRW markets of both Upbit and Bithumb. While these supporting sources have very low authority and appear to originate from the same entity, they represent the only direct evidence available. The evidence against the statement is significantly weaker and circumstantial. The most authoritative source, Upbit's official Datalab, does not mention the listing; however, as a market analysis tool rather than an official announcements channel, its silence is not strong contradictory evidence. Another low-authority source mentions a listing on a different exchange (KuCoin), which is a weak contradiction as a token can be listed on multiple exchanges simultaneously.In conclusion, the direct affirmations from the most relevant sources outweigh the weak and indirect counter-evidence. The confidence level is set to "medium" because the conclusion relies entirely on sources with very low established credibility, introducing significant uncertainty.