The artifact is a standing relay (RELAY.md, in the SETI@home spirit): any third party can extend the certified frontier verifiably without being trusted, because every results.csv line regenerates deterministically on any machine ('./cluster <lo> <hi>', demonstrated at write-up by reproduction of the 5e12 and 9.99e12 blocks), run_sweep.py resumes from the checkpointed frontier skipping completed blocks, and analyze.py enforces contiguity and OEIS anchors over the merged prefix; this finding's own history is the first successful relay leg — the initial run was deadline-stopped at 2.98e12 (sweep.log 'ALL-STOP queue_remaining=1702') and a checkpointed resume carried the contiguous prefix past 10^13 to 1.152e13.