labels on image manifest 

# Getting the image digest  
root@baboon:~# ctr -n k8s.io image ls | grep cat.wamblee.org/converge:1.0.0
cat.wamblee.org/converge:1.0.0       
application/vnd.docker.distribution.manifest.v2+json      sha256:c08c336462955fcf4a63357dd95b1c5a37f1fbf2ca96e476d38968c39e782b13 39.2 MiB  linux/amd64

# getting the manifest

# ctr -n k8s.io content get sha256:c08c336462955fcf4a63357dd95b1c5a37f1fbf2ca96e476d38968c39e782b13
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
   "config": {
      "mediaType": "application/vnd.docker.container.image.v1+json",
      "size": 1573,
      "digest": "sha256:f73adff49e6fb8d94c55cd4030e5045e854de284418e737493fc22727f6b4e44"
   },
   "layers": [
      {
         "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
         "size": 7748860,
         "digest": "sha256:be3c1309dc5ae93749438ca02ae64fae75cc04bf01507672f7ee0fe5dcc06c74"
      },
      {
         "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
         "size": 32034281,
         "digest": "sha256:72c349c372c463b95dca722c644359550949b2824852f02f1cf12b8b4b03bb0e"
      },
      {
         "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
         "size": 1304341,
         "digest": "sha256:bf7da15860525c2cba9a6639846b5ce958c373cdae44ca6f704af406703e52d5"
      }
   ]
}

# blob label? 
containerd.io/gc.ref.snapshot.overlayfs=sha256:a7800a8e9dc0e1b7141ee372c7a0bad3d34cd5d5b061a9cc41d928e331578e0e


# ctr -n k8s.io content ls  | grep sha256:a7800a8e9dc0e1b7141ee372c7a0bad3d34cd5d5b061a9cc41d928e331578e0e
sha256:f73adff49e6fb8d94c55cd4030e5045e854de284418e737493fc22727f6b4e44 1.573kB 5 days  containerd.io/gc.ref.snapshot.overlayfs=sha256:a7800a8e9dc0e1b7141ee372c7a0bad3d34cd5d5b061a9cc41d928e331578e0e,containerd.io/distribution.source.cat.wamblee.org=converge


# ctr -n k8s.io content ls | grep f73adff49e6fb8d94c55cd4030e5045e854de284418e737493fc22727f6b4e44
sha256:c08c336462955fcf4a63357dd95b1c5a37f1fbf2ca96e476d38968c39e782b13 951B    5 days  containerd.io/gc.ref.content.l.2=sha256:bf7da15860525c2cba9a6639846b5ce958c373cdae44ca6f704af406703e52d5,containerd.io/gc.ref.content.l.1=sha256:72c349c372c463b95dca722c644359550949b2824852f02f1cf12b8b4b03bb0e,containerd.io/gc.ref.content.l.0=sha256:be3c1309dc5ae93749438ca02ae64fae75cc04bf01507672f7ee0fe5dcc06c74,containerd.io/gc.ref.content.config=sha256:f73adff49e6fb8d94c55cd4030e5045e854de284418e737493fc22727f6b4e44,containerd.io/distribution.source.cat.wamblee.org=converge
sha256:f73adff49e6fb8d94c55cd4030e5045e854de284418e737493fc22727f6b4e44 1.573kB 5 days  containerd.io/gc.ref.snapshot.overlayfs=sha256:a7800a8e9dc0e1b7141ee372c7a0bad3d34cd5d5b061a9cc41d928e331578e0e,containerd.io/distribution.source.cat.wamblee.org=converge

https://www.mo4tech.com/revelation-containerd-image-file-loss-problem-is-caused-by-image-generation.html