Notes on verification

The 'first observation' claim is consistently reported across the original arXiv preprint, the Nature paper, and university press releases, but all sources trace back to the same research group (Baudin et al., ENS-PSL), so this is not independent scientific corroboration—rather one group's own novelty framing echoed by affiliated press offices. No independent replication or competing group's confirmation was found. [tier=silver indep_score=0.89 clusters=5 claim_tier=notable | framework convergence=single on The claim originates from and is repeated via the same research group's own publications and their institutional press offices (ENS-PSL, CNRS, and a seminar description at MPSD describing the same group's work) (upstreams: Baudin/Schmitt/Abou-Hamdan et al. research group, ENS-PSL/CNRS, published in Nature (2025) and arXiv (2306.05351, 2023)) — publishers independent, evidence may not be | kind=interpretive eligibility=medium]