upright=1.35|thumb|Church of the Holy Sepulchre __NOTOC__ Year 335 (CCCXXXV) was a common year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship 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 0xd9cee55f4c1822b27244c3635575f50bfe1d02b16c1e5cf49bec6979bab5a319. 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/81eb8479-d83a-4fa1-bbe1-ed66b893d4e1.json and https://artists.proofprofile.net/proofs/artist/81eb8479-d83a-4fa1-bbe1-ed66b893d4e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).