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 0xdaca6b137c37de382d4b88ab13a9ae44780168417ee568bf7c0a0113c9a792a1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4cc2337-6814-4639-ab66-ad34f7fad0aa.json and https://artists.proofprofile.net/proofs/artist/b4cc2337-6814-4639-ab66-ad34f7fad0aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1 الأڨدام (with Montassar Jebali, Dali Triki, Radhi Chawali & Marwen Soltana)