Elin Maria Katarina Johansson (born 5 August 1990) is a Swedish taekwondo athlete. She qualified for the 2012 Summer Olympics but lost against the Australian athlete Carmen Marton in the quarterfinal.
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 0x13f2eb13f52da9337c240ab439170368782cb4218b240e212aac59fbd86d5fe7. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/968c487e-f5f5-4f55-81fd-2a20214c5741.json and https://artists.proofprofile.net/proofs/artist/968c487e-f5f5-4f55-81fd-2a20214c5741.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).