Our teammember Gnomuz has an automatic backup of the blockchain database running around midnight CET every day, and it's then uploaded to Dropbox. MA

Database V2 (updated daily from 10 March 2022) https://www.dropbox.com/s/iijtnyj26lc9pbo/blockchain_v2_mainnet.sqlite.bz2?dl=0

Database V1 (snapshot as of 9 March 2022 00:00 CET, not updated anymore) https://www.dropbox.com/s/81y7o9zzm18dzr9/blockchain_v1_mainnet.sqlite.bz2?dl=0

The files can be decompressed with 7zip on windows (minimum version 21.07), lbzip2 recommended under Linux.