Sven Andersson may refer to: Sven Andersson (farmworker) (1668–1691) Sven Andersson (footballer, born 1907) (1907–1981), Swedish footballer Sven Andersson (footballer, born 1945), Swedish footballer
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 0xf676fe35e73d31268f4e971b90f194421508e9cd10ae0f365d2b982a053ce2dd. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3846b94a-7606-42be-8174-5a8b8a7aca4c.json and https://artists.proofprofile.net/proofs/artist/3846b94a-7606-42be-8174-5a8b8a7aca4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).