American Progress is an 1872 painting by John Gast, a Prussian-born painter, printer, and lithographer who lived and worked during the 1870s in Brooklyn, New York. American Progress, an allegory of ma
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 0xa5e9bf148700117072391aa27f3f72976ef4defe97e9528a029ea12db4b8a068. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44499a0b-83e2-422c-857d-e5cbbb9e47f0.json and https://artists.proofprofile.net/proofs/artist/44499a0b-83e2-422c-857d-e5cbbb9e47f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).