Lars Christian Jacobsen (born 20 September 1979) is a Danish retired professional footballer who played as a right back. He is currently an assistant coach of HB Køge. During a 20-year playing career
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4f7fb0669e874af8f729d10c524a3e8209d05a8fa75ff3945a7e36953bbfa. 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/4baf8dbb-4c09-4506-870a-f03dbad4a3e6.json and https://artists.proofprofile.net/proofs/artist/4baf8dbb-4c09-4506-870a-f03dbad4a3e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).