thumb|Rayon is made by dissolving cellulose and then precipitating it into a fiber. One method is shown here using a blue solution of cellulose (cuprammonium hydroxide used to dissolve) and colorless
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 0xaf3bdead6ab16ca3595401eb32d5b7d850ef8707941aa04c7fa2b7c5c4d5a4a3. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f1d164d-8add-4752-8fe9-7f1926fef5d3.json and https://artists.proofprofile.net/proofs/artist/2f1d164d-8add-4752-8fe9-7f1926fef5d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).