If you have dumped your GD-ROMs, making a formal submission here in the forum increases the likelihood of them being added as I still sit on 100s of unverified dumps and not even all those are visible in the public forum if their origin is my own work or other internal Dumpcast work.
I am always happy to see more people dumping their stuff and helping the collection become more complete. Minimal information needed for any new dump is checksums/sizes of the tracks, disc.gdi information and ringcode. If you give more information like barcode, pictures etc it's more than welcome, especially on uncommon things like the Powerstone sample you mention, where info is hard to find online.
I will run down the titles you mention so you can get an idea of where you stand.
> not sure what this is, probably DreamKey 1.0 French? Possibly a new dump, post ringcode, pictures etc!
20000320_DREAMKEY 1.5 FRENCH V.1.001_8320022 09V1.001
> seems to be the verified version seen on viewtopic.php?f=5&t=447
. If you have different checksums may be a bad dump or unknown variant?
20000414_DREAM PASSPORT3_6107819 V1.011
> some variants verified and some other have different ringcodes and are still unverified. Again, need ringcode to see if it should be matching any of them.
19991227_BIOHAZARD CODE VERONICA_T1207M V1.002_1
19991227_BIOHAZARD CODE VERONICA_T1207M V1.002_2
> Have unverified dumps of that sitting around. Please submit.
20000405_SAMBA DE AMIGO_HDR-0063 V1.000
> Have unverified variant. Again, ringcode needed to see if expected to match.
> Have unverified dump. Please submit.
20001013_RAILROAD TYCOON II DREAMCAST EDITION_T40505D 50V1.002
> verified from UK and German discs. If yours is such origin, almost certainly bad dump. If other origin (eg French), would like to investigate. However, this title is unlikely to have variants and bad dump is the most likely cause.
20001020_METROPOLIS STREET RACER_MK-5102250V1.002
> This is the 0146SA disc and it's now verified: viewtopic.php?f=5&t=1620
20001116_TOMB RAIDER CHRONICLES_T36815D09 V1.001
> Now verified: viewtopic.php?f=5&t=528
19990715_POWER STONE EUROPE SAMPLE_6107198 V1.000
> interesting and never dumped yet. Please submit! BTW, I have a PowerStone sample in the post, so they may be matched once I dump mine.
20000707_DREAMON HW BUNDLE 4_8320040 50V1.000
> verified in this very thread
20001213_SEGA SMASH PACK VOLUME 1_MK-51146 V1.002
> maybe it's the new verification here? viewtopic.php?f=4&t=1726