Verifiable raffles using the Hive blockchain as a source of randomness.
Enter the post whose comments will be the participants. This tool will suggest a future Hive block as the raffle's seed: since nobody can predict the contents of a block that doesn't exist yet, nobody can manipulate the result — not even you.
Publish this text publicly (for example as a comment on your own post) before that block arrives, so everyone knows in advance which block will decide the raffle:
Available as soon as the target block exists and is irreversible.
Enter the same data the organizer used (author, permlink and block number) and this tool will recompute the result from scratch. If it matches the announced winner, the raffle was legitimate.