Alexander Stepanovich Kaminsky (1829–1897, , sometimes spelled Kamensky, Каменский) was a Russian architect working in Moscow and suburbs. One of the most successful and prolific architects of the 186
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 0x999c2f39447e9a1ac6343f851b0f29e9c60a7455f7c7b91260f28dda07875b64. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d749d5-e342-42da-8dc3-1bd736fed55b.json and https://artists.proofprofile.net/proofs/artist/e4d749d5-e342-42da-8dc3-1bd736fed55b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).