Use the canonical render path for cache-first performance.
GET /render/{chain}/{collection}/{tokenId}/{assetId}/png?cache=1700000000000
GET /render/{chain}/{collection}/{tokenId}/png?cache=1700000000000
HEAD /render/{chain}/{collection}/{tokenId}/{assetId}/png?cache=1700000000000
cache= selects a specific cache epoch; omit it to use collection cache epoch or default.