Could you walk us through it again. You bought bitcoins somewhere- then sent them to the wallet you downloaded from bitblocks.io (which is probably a scam?), and now you want to access your bitcoins? Is that close?
Right i did the same, but back then it was hard to tell the difference between the wallets as bitsblock.io wallet and bitcoin core are very much same, and i had last used this bitsblock.io wallet in 2015 and till then everything was fine. but when my hard disk had some problems and after that i had changed many computers because of which my initial downloaded software was also deleted but as i had the seeds i didn't worry much until recently i wanted to reallocate the funds.
And i have even checked my addresses in which all the funds are safe, I have no idea whats bitsblock.io is doing but if they wanted to scam me or something they would have moved my wallet balance which is +4 BTC and is still not moved.
On bitsblock.io website initially when we register with our email address and a password then they send us a email instantly which contains 18 words seed and a written sentence "
In the event that you lose your password or our service is unavailable, this will be your safety net."
Now when i recently entered my 18 word seed and password (while initial sign up) then they gave me a software link which i installed and the wallet is in sync with the network now but then i came to know that my wallet is encrypted with a passphrase (i had never encrypted my wallet) , and now i had put a lot of guesses for the passphrase even used my initial password which i used to download the software but no luck. I even tried the dumpwallet command which @BitCryptex recommended but as the wallet is encrypted the file is not created.
I think all bitcoin core derivation paths are
So from past few days i have been looking for ways to restore the wallet through the seeds but failed as in electrum the derivation path should be correct, and in order to retrieve the private keys of the address using the seeds through
https://github.com/iancoleman/bip39/releases again the derivation path should be precise, and i read online that we can find the derivation path in the software somehow.