Question 1

How do validators verify video clip assets without downloading entire datasets?

Accepted Answer

Validators sample rows from each miner interval (minimum 2 rows, maximum 35, targeting 25% of the interval) and download only the sampled clip and frame assets. They verify SHA256 hashes against declared values in the parquet rows and check sampled clip resolution is exactly 1280x720. Hard checks (schema, YouTube source verification, overlap policy) run on the full record set without downloading assets.

Question 2

What happens if two miners submit overlapping video clips in the same interval?

Accepted Answer

Validators load a shared overlap index maintained by the owner-validator and prune any rows already seen in that index (row-level rejection, not full-interval rejection). For same-interval cross-miner conflicts on the same source, the miner with the earliest manifest creation timestamp wins; ties are broken lexicographically by hotkey.

Question 3

Can validators check whether captions accurately describe video content?

Accepted Answer

Yes. Validators can optionally enable semantic caption validation, which samples rows and uses OpenAI (gpt-4o) or Gemini (fallback) to verify that captions match sampled multi-frame visual context. This check is disabled by default and requires configuring an LLM API key and enabling NEXIS_VALIDATOR_SEMANTIC_CHECK_ENABLED.

Question 4

How often do miners need to upload new dataset packages?

Accepted Answer

Miners build and upload one package per 50-block interval. Every 50 blocks, the miner creates a new dataset.parquet and manifest.json keyed by the interval start block number and uploads to Cloudflare R2. Intervals are deterministic based on chain block height.

Question 5

What does the owner-validator do differently from regular validators?

Accepted Answer

Owner-validators (identified by a specific hotkey) additionally publish accepted miner interval metadata bundles (dataset.parquet and manifest.json) to a shared bucket and maintain a global overlap index snapshot in JSON format. All validators read this shared index to prune duplicate rows. Owners can also run an independent worker to copy full assets to a separate owner bucket.

Question 6

How are invalid miners prevented from earning rewards?

Accepted Answer

Validators fetch invalid hotkeys from an API (covering intervals in a rolling 500-interval window) and zero those hotkeys before submitting set_weights to the chain every 250 blocks. Hard failures (non-YouTube sources, schema errors, asset hash mismatches, source authenticity failures) also cause immediate interval rejection and contributor scoring penalties.

Subnet 70

Subnet 70

Hardware Requirements

Hardware Requirements

Miner Setup

Validator Setup

Participate

Participate

Hardware Requirements

Hardware Requirements

Miner Setup

Validator Setup