Bernt "Sump-Hugo" Andersson (5 September 1933 – 6 January 2020) was a Swedish football player and manager. A midfielder, he made 91 Allsvenskan appearances for Djurgårdens IF and scored 19 goals. Hon
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 0x1de9779a0277c684986d4c773071b47f664dda7fd67e22f89468e01d4a8100dc. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd9a10ee-e5ae-4678-89e6-5dfd619fb3ef.json and https://artists.proofprofile.net/proofs/artist/fd9a10ee-e5ae-4678-89e6-5dfd619fb3ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).