3.26.1 html 29 130 1 true 13 0 false 4 false false R1.htm 00000001 - Document - Cover Sheet http://ospreyfunds.io/role/Cover Cover Cover 1 false false R2.htm 00000002 - Statement - Statements of Assets and Liabilities Sheet http://ospreyfunds.io/role/StatementsOfAssetsAndLiabilities Statements of Assets and Liabilities Statements 2 false false R3.htm 00000003 - Statement - Statements of Assets and Liabilities (Parenthetical) Sheet http://ospreyfunds.io/role/StatementsOfAssetsAndLiabilitiesParenthetical Statements of Assets and Liabilities (Parenthetical) Statements 3 false false R4.htm 00000004 - Statement - Schedules of Investments (Unaudited) (Parenthetical) Sheet http://ospreyfunds.io/role/SchedulesOfInvestmentsParenthetical Schedules of Investments (Unaudited) (Parenthetical) Statements 4 false false R5.htm 00000005 - Statement - Schedules of Investments (Unaudited) Sheet http://ospreyfunds.io/role/SchedulesOfInvestments Schedules of Investments (Unaudited) Statements 5 false false R6.htm 00000006 - Statement - Statements of Operations (Unaudited) Sheet http://ospreyfunds.io/role/StatementsOfOperations Statements of Operations (Unaudited) Statements 6 false false R7.htm 00000007 - Statement - Statements of Changes in Net Assets (Unaudited) Sheet http://ospreyfunds.io/role/StatementsOfChangesInNetAssets Statements of Changes in Net Assets (Unaudited) Statements 7 false false R8.htm 00000008 - Statement - Statements of Changes in Net Assets Sheet http://ospreyfunds.io/role/StatementsOfChangesInNetAssetsStatement Statements of Changes in Net Assets Statements 8 false false R9.htm 999009 - Disclosure - Organization Sheet http://ospreyfunds.io/role/Organization Organization Notes 9 false false R10.htm 999010 - Disclosure - Summary of Significant Accounting Policies Sheet http://ospreyfunds.io/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 10 false false R11.htm 999011 - Disclosure - Fair Value of Bitcoin Sheet http://ospreyfunds.io/role/FairValueOfBitcoin Fair Value of Bitcoin Notes 11 false false R12.htm 999012 - Disclosure - Related Parties Sheet http://ospreyfunds.io/role/RelatedParties Related Parties Notes 12 false false R13.htm 999013 - Disclosure - Creations and Redemptions of Shares Sheet http://ospreyfunds.io/role/CreationsAndRedemptionsOfShares Creations and Redemptions of Shares Notes 13 false false R14.htm 999014 - Disclosure - Federal Income Taxes Sheet http://ospreyfunds.io/role/FederalIncomeTaxes Federal Income Taxes Notes 14 false false R15.htm 999015 - Disclosure - Risks and Uncertainties Sheet http://ospreyfunds.io/role/RisksAndUncertainties Risks and Uncertainties Notes 15 false false R16.htm 999016 - Disclosure - Indemnifications Sheet http://ospreyfunds.io/role/Indemnifications Indemnifications Notes 16 false false R17.htm 999017 - Disclosure - Commitments and Contingent Liabilities Sheet http://ospreyfunds.io/role/CommitmentsAndContingentLiabilities Commitments and Contingent Liabilities Notes 17 false false R18.htm 999018 - Disclosure - Financial Highlights Sheet http://ospreyfunds.io/role/FinancialHighlights Financial Highlights Notes 18 false false R19.htm 999019 - Disclosure - Subsequent Events Sheet http://ospreyfunds.io/role/SubsequentEvents Subsequent Events Notes 19 false false R20.htm 999020 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://ospreyfunds.io/role/SummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://ospreyfunds.io/role/SummaryOfSignificantAccountingPolicies 20 false false R21.htm 999021 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://ospreyfunds.io/role/SummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) Tables http://ospreyfunds.io/role/SummaryOfSignificantAccountingPolicies 21 false false R22.htm 999022 - Disclosure - Fair Value of Bitcoin (Tables) Sheet http://ospreyfunds.io/role/FairValueOfBitcoinTables Fair Value of Bitcoin (Tables) Tables http://ospreyfunds.io/role/FairValueOfBitcoin 22 false false R23.htm 999023 - Disclosure - Creations and Redemptions of Shares (Tables) Sheet http://ospreyfunds.io/role/CreationsAndRedemptionsOfSharesTables Creations and Redemptions of Shares (Tables) Tables http://ospreyfunds.io/role/CreationsAndRedemptionsOfShares 23 false false R24.htm 999024 - Disclosure - Financial Highlights (Tables) Sheet http://ospreyfunds.io/role/FinancialHighlightsTables Financial Highlights (Tables) Tables http://ospreyfunds.io/role/FinancialHighlights 24 false false R25.htm 999025 - Disclosure - Schedule Of Restatement For The Financial Statements (Details) Sheet http://ospreyfunds.io/role/ScheduleOfRestatementForFinancialStatementsDetails Schedule Of Restatement For The Financial Statements (Details) Details 25 false false R26.htm 999026 - Disclosure - Summary of Significant Accounting Policies (Details Narrative) Sheet http://ospreyfunds.io/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative Summary of Significant Accounting Policies (Details Narrative) Details http://ospreyfunds.io/role/SummaryOfSignificantAccountingPoliciesTables 26 false false R27.htm 999027 - Disclosure - Schedule of Fair Value, Assets Measured on Recurring Basis (Details) Sheet http://ospreyfunds.io/role/ScheduleOfFairValueAssetsMeasuredOnRecurringBasisDetails Schedule of Fair Value, Assets Measured on Recurring Basis (Details) Details 27 false false R28.htm 999028 - Disclosure - Schedule of Investment Holdings of Investments (Details) Sheet http://ospreyfunds.io/role/ScheduleOfInvestmentHoldingsOfInvestmentsDetails Schedule of Investment Holdings of Investments (Details) Details 28 false false R29.htm 999029 - Disclosure - Fair Value of Bitcoin (Details Narrative) Sheet http://ospreyfunds.io/role/FairValueOfBitcoinDetailsNarrative Fair Value of Bitcoin (Details Narrative) Details http://ospreyfunds.io/role/FairValueOfBitcoinTables 29 false false R30.htm 999030 - Disclosure - Related Parties (Details Narrative) Sheet http://ospreyfunds.io/role/RelatedPartiesDetailsNarrative Related Parties (Details Narrative) Details http://ospreyfunds.io/role/RelatedParties 30 false false R31.htm 999031 - Disclosure - Schedule of Activity in the Number and Value of Shares Created and Redeemed (Details) Sheet http://ospreyfunds.io/role/ScheduleOfActivityInNumberAndValueOfSharesCreatedAndRedeemedDetails Schedule of Activity in the Number and Value of Shares Created and Redeemed (Details) Details 31 false false R32.htm 999032 - Disclosure - Creations and Redemptions of Shares (Details Narrative) Sheet http://ospreyfunds.io/role/CreationsAndRedemptionsOfSharesDetailsNarrative Creations and Redemptions of Shares (Details Narrative) Details http://ospreyfunds.io/role/CreationsAndRedemptionsOfSharesTables 32 false false R33.htm 999033 - Disclosure - Federal Income Taxes (Details Narrative) Sheet http://ospreyfunds.io/role/FederalIncomeTaxesDetailsNarrative Federal Income Taxes (Details Narrative) Details http://ospreyfunds.io/role/FederalIncomeTaxes 33 false false R34.htm 999034 - Disclosure - Schedule of Investment Company Financial Highlights (Details) Sheet http://ospreyfunds.io/role/ScheduleOfInvestmentCompanyFinancialHighlightsDetails Schedule of Investment Company Financial Highlights (Details) Details 34 false false R35.htm 999035 - Disclosure - Subsequent Events (Details Narrative) Sheet http://ospreyfunds.io/role/SubsequentEventsDetailsNarrative Subsequent Events (Details Narrative) Details http://ospreyfunds.io/role/SubsequentEvents 35 false false All Reports Book All Reports form10-q.htm obtc-20260331.xsd obtc-20260331_cal.xml obtc-20260331_def.xml obtc-20260331_lab.xml obtc-20260331_pre.xml form10-q_001.jpg http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/dei/2026 true true