thumb|District Six in 2014 thumb|District Six memorial plaque thumb|upright|African National Congress election poster blaming the Democratic and New National parties for the forced removals, 2001 Dist
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 0x2dece541cfc9c845627a38970fe1e42989647358ce91bddb16e1d53b94264cd1. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a02f8a7b-2b0c-4f36-9d2e-65d5031ce99c.json and https://artists.proofprofile.net/proofs/artist/a02f8a7b-2b0c-4f36-9d2e-65d5031ce99c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).