Mary Jane Rathbun (December 22, 1922 – April 10, 1999), popularly known as Brownie Mary, was an American medical cannabis rights activist. As a hospital volunteer at San Francisco General Hospital, s
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b78c5254357ee3e8f22eaf9017a4dc079327f73aa1abeb00a7f9998b0a936. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/895b900a-e10d-4efe-baf3-c5c91bfb9b70.json and https://artists.proofprofile.net/proofs/artist/895b900a-e10d-4efe-baf3-c5c91bfb9b70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).