0x177d8728a0930e289a47237f5e1e53f9a0c765acd138c42fa4b269992ef2d3eb

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.