Document checksums and final availability

README.md

@@ -76,9 +76,20 @@ One row:
  "youtube_url": "https://www.youtube.com/watch?v=-EOhDHns4xw",
  "audio": {"path": "audio/train/00/-EOhDHns4xw.webm", "bytes": 11536470,
            "duration": 255.981, "codec": "opus", "channels": 4,
-           "channel_layout": "ambisonic 1", "sample_rate": 48000},
+           "channel_layout": "ambisonic 1", "sample_rate": 48000,
+           "sha256": "6e4f14c2cb0c0790..."},
  "video": {"path": "video/train/00/-EOhDHns4xw.webm", "bytes": 557769482,
-           "duration": 256.008, "codec": "vp9", "width": 3840, "height": 2160}}
+           "duration": 256.008, "codec": "vp9", "width": 3840, "height": 2160,
+           "sha256": "..."}}
+```
+
+Every entry carries `bytes` and `sha256`, so a download can be checked without
+trusting the transfer:
+
+```python
+import hashlib
+h = hashlib.sha256(open(audio, "rb").read()).hexdigest()
+assert h == r["audio"]["sha256"]
 ```
 
 Pull one shard instead of 5.66 TB:
@@ -107,11 +118,10 @@ hf download OmniAV/Sphere360 --repo-type dataset --include "audio/train/00/*" "v
 
 ## Availability
 
-The dataset is uploaded in shards. `metadata/*.jsonl` lists only rows whose files
-are already present, and `metadata/stats.json` records the published shards under
-`published_shards` — so a run driven by the metadata never asks for a missing
-file. Counts in the table above are the full target; check `published_rows` for
-what is live right now.
+All 64 shards are published — 11,787 files, 5.66 TB. `metadata/*.jsonl` lists
+only rows whose files are actually present, and `metadata/stats.json` records the
+live set under `published_shards` / `published_rows`, so a run driven by the
+metadata never asks for a missing file.
 
 ## Citation