| Document And Entity Information | Feb. 04, 2022 |
| Document Information Line Items | |
| Entity Registrant Name | Osprey Bitcoin Trust |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Central Index Key | 0001767057 |
| Document Period End Date | Feb. 4, 2022 |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-56307 |
| Entity Tax Identification Number | 83-2424407 |
| Entity Address, Address Line One | 520 White Plains Road |
| Entity Address, Address Line Two | Suite 500 |
| Entity Address, City or Town | Tarrytown |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10591 |
| City Area Code | 914 |
| Local Phone Number | 214-4697 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | None |
