Evidence-bound labels and MCP enrichment for Chain 4663 Blockscout

[vj1977]

CHAIN4663 is an independent evidence project for Robinhood Chain (EVM chain ID 4663). This is not an official Robinhood request, and it does not claim current support, compatibility, safety, or endorsement.

Blockscout already provides the Chain 4663 explorer and exposes APIs, an SDK,
and MCP. CHAIN4663 can contribute exact accepted address labels, incident and
freshness state, where-used links, venue evidence, and correction-aware event
cursors. Would Blockscout review a read-only enrichment mapping for the
existing explorer/MCP surfaces? We would preserve Blockscout as the explorer
authority and keep every CHAIN4663 label visibly evidence-bound.

Evidence reference:

• Outreach: P8-015-EXPLORER-BLOCKSCOUT
• Artifact: data-platform-integration-kit:v1:sha256:b1592d3b4605a6840016638e6d5ac18d2fd349ffee677bb8ea2f12b2cd210944
• Workflow: node reference-implementation/integrations/data-platform-v2/roles/agent/quickstart.mjs
• The exact artifact is in a private prerelease repository; we can provide the checksummed bytes or a minimal fixture through a maintainer-approved channel.

Proposed success signal: an accepted field mapping, import format, or concrete
upstream issue referencing the artifact.

If this discussion is not the right channel, please point us to the appropriate one and feel free to close it.