David Andersson may refer to: David Andersson (musician) (1975–2022), Swedish heavy metal guitarist (Soilwork) David Andersson (orienteer) (born 1981), Swedish orienteering competitor David Anders
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 0xc59d14f19c1cd3359c57875035c47c04d84327c20d7c1b339e44e658e9b6c3ee. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcf23c76-f50f-4e57-8c48-fe839c422ccf.json and https://artists.proofprofile.net/proofs/artist/bcf23c76-f50f-4e57-8c48-fe839c422ccf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).