Stalingrad Cowgirls was a three-piece punk rock band hailing from a small town of Salla in Finnish Lapland, 60 kilometres north from the Arctic Circle. The name is a tribute to Leningrad Cowboys. The
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 0x37336c34cafa024ab3d33913e7330a5fb9b179bcffe1f5a405f56ce4a8d83130. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c833a0d0-7bf4-4773-94be-04d03f43874e.json and https://artists.proofprofile.net/proofs/artist/c833a0d0-7bf4-4773-94be-04d03f43874e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).