v3.26.1
Cover - shares
9 Months Ended
Mar. 31, 2026
Mar. 31, 2026
May 19, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Cover [Abstract]                    
Document Type   10-Q                
Amendment Flag   false                
Document Quarterly Report   true                
Document Period End Date   Mar. 31, 2026                
Document Fiscal Period Focus   Q3                
Document Fiscal Year Focus   2026                
Current Fiscal Year End Date   --06-30                
Entity File Number   000-56340                
Entity Registrant Name   C2 Blockchain, Inc.                
Entity Central Index Key   0001882781                
Entity Tax Identification Number   87-2645378                
Entity Incorporation, State or Country Code   NV                
Entity Address, Address Line One   12818 SW 8th St Unit #2008                
Entity Address, City or Town   Miami                
Entity Address, State or Province   FL                
Entity Address, Postal Zip Code   33184                
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                
Elected Not To Use the Extended Transition Period   false                
Entity Shell Company   false                
Common Stock, Shares, Issued 465,935,905 465,935,905 224,735,905 410,486,055 393,319,338 274,736,005 261,936,005 253,936,005 253,936,005 253,936,005