Ruby Khan (; born ) is a Nepalese women's rights activist. In October 2021, she received national attention when she led a protest march from Nepalgunj to Kathmandu, followed by a sit-in protest, to d
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3829ab401afb7ee51b801cd12e389f08cc889a3449c0a77acbdeb6f951b335. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c214ceec-4385-4dad-983a-217bba9a788f.json and https://artists.proofprofile.net/proofs/artist/c214ceec-4385-4dad-983a-217bba9a788f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).