thumb|Dannet, 2020 thumb|Dannet, 2018 thumb|Dannet, 2018 Dannet is a village and rural commune in Niger.Loi n° 2002-014 du 11 JUIN 2002 portant création des communes et fixant le nom de leurs chefs-l
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 0xa5dadcdd9cc312badcc0349b503b5ea749c1035ae66e7c96465e6364a369490f. 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/3aedf43e-f45e-4288-8208-724eecc5a632.json and https://artists.proofprofile.net/proofs/artist/3aedf43e-f45e-4288-8208-724eecc5a632.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).