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Related party transactions and balances (Details) - USD ($)
3 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Jul. 31, 2025
Related Party Transactions [Abstract]      
Accrued liabilities $ 6,582,418   $ 7,059,064
Share based compensation incurred 33,409    
Accrued interest 271,200 $ 12,740  
Directors and Officers [Member]      
Related Party Transactions [Abstract]      
Accrued liabilities 226,410   $ 794,990
Related Party [Member]      
Related Party Transactions [Abstract]      
Accrued wages 113,750    
Management fees 120,000    
Accrued interest $ 62,622