Johan Svedberg (born February 14, 1980) is a Swedish former professional ice hockey defenceman who played in the Swedish Hockey League for Timrå IK and Leksands IF. Playing career On April 2, 2004,
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 0xe321a9b329d296ba779e611f0f9278dd5975acf3be727e7503ccc1611a74e358. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0bbc973-c299-402d-8362-18d51b5d3a4f.json and https://artists.proofprofile.net/proofs/artist/f0bbc973-c299-402d-8362-18d51b5d3a4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).