Jan Marcus Lindberg (born 31 August 1980) is a Swedish former professional footballer. He won tree caps for the Sweden national team between 2001 and 2009. Coaching career After retiring, it was anno
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 0x7cdae68261b48bae2bb1ac626dc43f7b5f82226c0463d1150c1cac0f3974ce93. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cfd9a45-cfc0-4396-988a-1cd4c5f756e9.json and https://artists.proofprofile.net/proofs/artist/4cfd9a45-cfc0-4396-988a-1cd4c5f756e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).