0x8089c9bac146736d0df426650a1b1fee9c92cdafc9c1699748f6bea57fc4e061

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.