BlackRock Moves Large Bitcoin and Ethereum Holdings to Coinbase Exchange

The assessment is "likely_true" with high confidence based on corroborating evidence from multiple sources of varying authority.The most critical part of the claim, that BlackRock utilizes Coinbase for its Bitcoin holdings, is strongly supported by high-authority evidence. The official S-1 filing with the SEC is a primary legal document that formally establishes Coinbase as the custodian for BlackRock's Bitcoin trust. This provides the foundational, structural proof for the relationship.This relationship is further confirmed by specific actions reported in the news. A financial news wire report from Moomoo, a source with high relevance and moderate authority, explicitly states that BlackRock transferred a specific amount of Bitcoin to the Coinbase Prime platform. This provides direct evidence of the 'move' mentioned in the user's statement.The second part of the claim, regarding Ethereum, is supported by a lower-authority but highly relevant source, Cryptoninjas. This crypto-focused news article reports that BlackRock moved both Bitcoin and Ethereum to Coinbase. While this is the only source to explicitly mention Ethereum, its credibility is enhanced by the fact that its reporting on the Bitcoin transfer aligns with information from higher-authority sources. There is no conflicting evidence among the provided sources. The highest-authority sources (the official BlackRock page and the S-1 filing) focus on the approved Bitcoin ETF and therefore do not mention Ethereum, but this omission is not a contradiction. The combination of official documentation establishing the custodial relationship for Bitcoin and specific news reports of both Bitcoin and Ethereum being transferred to that custodian makes the overall statement very likely to be true.