thumb|Bowl of chili with sour cream and cheese thumb|Crisp potato skins with sour cream and chili sauce thumb| Mixed berries with sour cream and brown sugar Sour cream (sometimes known as soured cre
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 0xf5025157dd332b62683da1be0954a3744a548b67dfd14dd38b592b468743569b. Chain 2 (Bitcoin): anchored in block 953851 (2026-06-15T23:06:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/021a9840-60f2-4cc7-8df2-1d1c9b923e4f.json and https://artists.proofprofile.net/proofs/artist/021a9840-60f2-4cc7-8df2-1d1c9b923e4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Henry VIII & La Musica Speculativa [The Baldwine Manuscript]