BlackRock Moves 1,178 Bitcoin From IBIT Spot Bitcoin ETF to Coinbase Prime

The core transfer claim is corroborated by PANews, which explicitly says that according to Arkham, BlackRock transferred about 1,178 BTC to Coinbase Prime through IBIT on April 6-April 7. The BlackRock iShares Bitcoin Trust ETF | IBIT page and the SEC-filed iShares Bitcoin Trust prospectus (Form 424B3) independently confirm that IBIT is BlackRock's spot bitcoin vehicle and that Coinbase entities are central to its custody/prime infrastructure, making such operational transfers plausible. However, the exact primary evidence for the specific 1,178 BTC movement was not directly fetched from Arkham or the traced X posts, because the X fetches failed and no Arkham alert page was obtained. Also, the stronger user wording 'from IBIT Spot Bitcoin ETF to Coinbase Prime' should be treated carefully: the prospectus shows ETF operations involve custody and cash-based creation/redemption mechanics, so a move to Coinbase Prime can reflect operational flows rather than a simple investor-facing outflow or redemption. The statement that Arkham flagged the transfer is supported secondarily by PANews, but the added claim that 'additional movements may follow' was not directly verified from a primary post in this run.