Johan Birger Matias Kvarnström (born 27 March 1986) is a Finland-Swedish politician currently serving in the Parliament of Finland for the Social Democratic Party of Finland at the Uusimaa constituenc
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 0x391a9a0d1f383df6a41ec136e6fa2a7823915ec9b658108fb6fdb552d1e816c1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09409a92-9907-47d4-ad7b-6211973cb6a1.json and https://artists.proofprofile.net/proofs/artist/09409a92-9907-47d4-ad7b-6211973cb6a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).