The assessment is 'likely_true' with high confidence based on strong, corroborating evidence from high-authority sources. The cornerstone of this assessment is the Grayscale research report, a source with very high authority (0.95) and relevance (0.90). It explicitly discusses on-chain 'usage metrics' for Q4 2025 and directly names 'Artemis' as its data source. This provides powerful secondary confirmation that Artemis, the company mentioned in the claim, produces the specific type of data ('usage metrics') for the exact time frame ('2025') in question. While the Artemis source itself (a Medium post presenting data from its terminal) does not contain the specific quote from the CEO in its summary, its title, 'Top 12 Defining Charts and Data of 2025', strongly suggests it is a year-end report where such a finding would be highlighted. It is the primary source of the data Grayscale references.Furthermore, the Coinfomania article, although focused on 'revenue' rather than 'usage metrics,' provides circumstantial support by reporting that Solana led all major blockchains in a key performance indicator in 2025. This aligns with the general sentiment of Solana's market leadership during that period. Although there is no direct confirmation that the statement was made verbatim by the 'CEO of Artemis,' the most critical parts of the claim—that data from Artemis shows Solana leading in usage metrics for 2025—are substantially supported by high-quality evidence. The lack of any contradictory information across all provided sources further strengthens this conclusion.