thumb|upright=1.5|Young women offer berries to visitors to their izba home, 1909. Those who had been serfs among the Russian peasantry were officially emancipated in 1861. Photograph by Sergey Prokudi
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 0xcb179da49f986b6cc22247116979ac987885baa456153e2098880430e2dfa186. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/292fbd15-56d3-439b-9e92-17d1da1f7393.json and https://artists.proofprofile.net/proofs/artist/292fbd15-56d3-439b-9e92-17d1da1f7393.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).