ブラックロック、ビットコインとイーサリアム計3億1,000万ドルをCoinbase Primeへ移管

The assessment is "likely_true" because the core claim of the statement—that BlackRock transferred Bitcoin and Ethereum to the Coinbase Prime platform—is directly supported by multiple independent news sources. Both a financial news article and a crypto news brief report that BlackRock made such a transfer of assets related to its ETFs to Coinbase Prime. This corroboration of the fundamental action provides a strong basis for the statement's truthfulness.However, there is significant conflicting evidence regarding the specific value of the transfer. The statement claims a value of $310 million, but this figure is not substantiated by any of the provided sources. Instead, one source reports the value as $163 million, while another cites a much larger figure of $670 million. While this discrepancy on the exact amount makes the statement factually imprecise as written, it does not invalidate the underlying event, which is the most significant part of the claim. The variance in reported figures is common with large financial transfers and could be due to different reporting times, methodologies, or which specific assets were included in the calculation. Because the central event is confirmed and only the specific value is in question, the statement is considered more likely to be true than false, with a high degree of confidence that the transfer did occur.