thumb|200px|The "We Can Do It!" poster was widely seen on the United States home front during World War II; it became popular in the 1980s. Today, it is often associated with the cultural icon Rosie t
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 0x33b81eb7ab57373bb32a5fb93a48ea2e77753ad1640b736305cd8733f9011f41. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d4c8055-a708-4aaf-8dd5-2136b2ca071e.json and https://artists.proofprofile.net/proofs/artist/0d4c8055-a708-4aaf-8dd5-2136b2ca071e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).