0x301ef216a313df2b97da8fb32a9cd8245b3eb5446e4c5cae5f30db04990e7bdc

How to verify this batch yourself

Take any stamp's content hash, walk the merkle proof in its certificate to recompute the root, then call timestamps(root) on the BA Stamper contract on any Polygon full node. The block timestamp returned is the on-chain proof — no trust in BA Stamp required.