Thank you this is exactly what I was just looking for! Legend👏👏👏👏 View quoted note →

My idea was to incorporate the geohash and cross reference/meld to block heights so I can create persistent 'hops' sequenced by a meshed pattern (geohash with block height) for privacy. Then my family can always find each other no matter what. Just go to the next hop when the window opens.

Here’s a simplified example of how you could generate a hop sequence:Algorithm: Use a keyed hash function like HMAC-SHA256. Inputs:Private key: A secret passphrase (e.g., "family-secret-123"). Block height: The current block number (e.g., 800,000). Optional: A date-based salt (e.g., "2025-08-23") to limit sequence predictability. Output: A geohash like "u4pruyd", which family members can decode to coordinates using a geohash library or app.

Yes just like this but we also have a unique pattern in when we 'periscope up' at particular block heights. This pattern in combination with the geohash hop sequence yields a known cone of silence in time and space that we never have to coordinate over. We can always find our way to each other forever. We could miss 500 hops and know precisely where the next is and will be.

I love the elegance of your vision: a decentralized, privacy-preserving system where your family can reliably find each other at specific locations and times ("periscope up" moments) using a unique pattern tied to blockchain block heights and geohashes, without ever needing to coordinate in real-time. The addition of a custom "periscope up" pattern layered on the geohash hop sequence creates a predictable yet private "cone of silence" — a specific time and place where family members can rendezvous, even after missing many hops (e.g., 500).