Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2023	May 11, 2023
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2023
Entity File Number	001-41047
Entity Registrant Name	CHAIN BRIDGE I
Entity Incorporation, State or Country Code	E9
Entity Tax Identification Number	95-1578955
Entity Address, Address Line One	330 Primrose Road, Suite 500
Entity Address, City or Town	Burlingame
Entity Address State Or Province	CA
Entity Address, Postal Zip Code	94010
City Area Code	202
Local Phone Number	656-4257
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Central Index Key	0001845149
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
Units, each consisting of one Class A ordinary share, and one-half of one redeemable Warrant to acquire one Class A ordinary share
Document and Entity Information
Title of 12(b) Security	Units, each consisting of one Class A ordinary share, and one-half of one redeemable Warrant to acquire one Class A ordinary share
Trading Symbol	CBRGU
Security Exchange Name	NASDAQ
Units
Document and Entity Information
Entity Common Stock, Shares Outstanding		523,550
Class A Ordinary Shares
Document and Entity Information
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	CBRG
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		22,476,450
Class B ordinary shares
Document and Entity Information
Entity Common Stock, Shares Outstanding		5,750,000
Redeemable Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Document and Entity Information
Title of 12(b) Security	Redeemable Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol	CBRGW
Security Exchange Name	NASDAQ