thumb|upright=1|Bas relief of a seraph carrying a hot coal on the walls of the Jerusalem International YMCA. A seraph ( ; pl.: ) is a celestial or heavenly being originating in Ancient Judaism. The
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 0x3d415463bf49ff2713d209d2ae661f457ee3a68806d2e3ddd550f13a25956a78. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2b0dff7-666d-4c86-bf56-49d2428c8bf6.json and https://artists.proofprofile.net/proofs/artist/e2b0dff7-666d-4c86-bf56-49d2428c8bf6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).