0x1998da11d1e049a2190290270d301bcae552ca14ef4e0276fb3cc6bdb3a7ffdf

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.