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 0xf067bc2239eb8511087d7d2b754e9d2fa23f414d6882782775a006e68e8cd82b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/246a1ce9-9b5c-4f5c-8fa6-e5f2934f3fbf.json and https://artists.proofprofile.net/proofs/artist/246a1ce9-9b5c-4f5c-8fa6-e5f2934f3fbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sajha Pani, Nepali Song, Surekha Chhetri