right|thumb|300px|Some of the most common cherry bombs and globe salutes commercially available in the United States. Picture scale: the blue lines in the background are ½-inch apart. From top left:
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54230a4e9c054f67fe68f242e5fdc7756ff6260a3080f30db0ef266ea3da6b9. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13ee1f89-61b4-412d-b152-78fe8b94a0c9.json and https://artists.proofprofile.net/proofs/artist/13ee1f89-61b4-412d-b152-78fe8b94a0c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).