thumb|upright=1.3|Hamada plateau at Tademaït, Algeria. Photograph by French explorer Fernand Foureau during his trans-Saharan journey in 1890. thumb|Hamada in the interior of the Cape Verde island of
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 0x20ac5e46e0021cb27da910831dfd1f8ad5792a2ba13554bc1b10ce653f29f92b. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbe2b105-f75f-4175-b90a-d7b581b3e4a6.json and https://artists.proofprofile.net/proofs/artist/cbe2b105-f75f-4175-b90a-d7b581b3e4a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).