Dorka () is a rural locality (a village) in Voskresenskoye Rural Settlement, Cherepovetsky District, Vologda Oblast, Russia. The population was 6 as of 2002.Данные переписи 2002 года: таблица 2С. М.:
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 0x8c8594dd8112ac308a4b161fadb1243bfbb7194dc703e77cc13cd436232cb853. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c91f256-1dfa-4bb7-b4dd-9d6dc57c2551.json and https://artists.proofprofile.net/proofs/artist/9c91f256-1dfa-4bb7-b4dd-9d6dc57c2551.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).