H33-74 on Cosmos

Cosmos is one of H33-74's anchor surfaces, not its foundation. The receipt exists before the Cosmos anchor and remains valid if the Cosmos anchor is later supplemented or replaced on another chain. Cosmos provides one independent notarization. H33-74 receipts can carry many.

How H33-74 anchors to Cosmos

H33-74 anchors to Cosmos chains via memo-field commitments in standard Bank send transactions. Per-chain selection (Cosmos Hub, Osmosis, dYdX, Celestia, app-specific chains) gives operators latitude over which Cosmos chain's economic security underwrites the anchor.

Chain parameters

Chain

Cosmos

Finality

Instant finality (Tendermint BFT consensus); typically ~6 seconds per block, finality at block production.

Anchor cost

Single-digit cents per anchor transaction on Cosmos Hub; varies across application-specific chains.

Explorer

mintscan.io

What an H33-74 anchor record contains

The 32-byte commitment from the receipt (or a Merkle root if batched).
Sufficient on-chain bytes for a third party to verify the commitment matches the receipt.
A timestamp from the Cosmos block, providing independent proof that the receipt existed by no later than that block.

What it does not contain: sensitive payload data. The receipt's content lives off-chain. The anchor only commits to its existence and identity.

When Cosmos is the right anchor

Cosmos is the right anchor when sovereign-chain notarization is desirable, when the operator wants to choose specific Cosmos zones based on their economic security, validator set, and governance model, and when IBC interoperability with other Cosmos chains is valuable. Particularly appropriate for organizations operating their own Cosmos appchain who want anchoring within their sovereign zone.

The portability story

A receipt anchored on Cosmos can also be anchored on Bitcoin, Ethereum, Solana, Polygon zkEVM, Zcash, or any other chain H33-74 supports. The anchors are independent. Adding more anchors does not change the receipt. Removing one anchor (or having one chain become unavailable) does not invalidate the others.

If Cosmos ever becomes inappropriate for an operator's use case (regulatory, performance, security, cost), the operator adds an anchor on a different chain and continues operating. The historical evidence does not have to migrate, because it was never bound to Cosmos.

Verifying a Cosmos anchor

A third-party verifier needs the H33-74 receipt, the Cosmos anchor transaction (or its hash), and the open-source H33 verifier. From those inputs:

The verifier checks the three post-quantum signatures over the receipt.
The verifier checks that the Cosmos anchor transaction commits to the receipt's identity.
The verifier reads the Cosmos block timestamp to establish independent existence-time.

See H33-74 on other chains

The same receipts that anchor to Cosmos can anchor to any of the others.

One Receipt. Multiple Chains. H33-74 Overview