$ wget https://bitcoincore.org/depends-sources/miniupnpc-2.2.2.tar.gz
--2021-07-26 15:44:33-- https://bitcoincore.org/depends-sources/miniupnpc-2.2.2.tar.gz
Resolving bitcoincore.org (bitcoincore.org)... 198.251.83.116, 107.191.99.5
Connecting to bitcoincore.org (bitcoincore.org)|198.251.83.116|:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2021-07-26 15:44:34 ERROR 404: Not Found.
$ wget https://bitcoincore.org/depends-sources/capnproto-c++-0.7.0.tar.gz
--2021-07-26 15:41:57-- https://bitcoincore.org/depends-sources/capnproto-c++-0.7.0.tar.gz
Resolving bitcoincore.org (bitcoincore.org)... 107.191.99.5, 198.251.83.116
Connecting to bitcoincore.org (bitcoincore.org)|107.191.99.5|:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2021-07-26 15:41:58 ERROR 404: Not Found.
Did not test all of dependencies though.
UPDATE: This script allows to verify all downloads.