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 0x55b9e32197f19549a1c41b6802d3d047b1adb1c02b477e980ef1a82f2874158c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90f648af-e572-42d8-b022-025ef0733dc8.json and https://artists.proofprofile.net/proofs/artist/90f648af-e572-42d8-b022-025ef0733dc8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gymnastique de maintien : 30 exercices - niveau 6 à 14 ans, leçons 5 et 6 (Mono Version)