Chemical free is a term used in marketing to imply that a product is safe, healthy or environmentally friendly because it only contains natural ingredients. The term is a misnomer, as all substances a
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 0xb2bee63b4b47fa34fa357f1a5d4794b4e8d359a09e897cb1a7340d6a58b9b36d. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb3fd4f7-047f-4b4e-b381-d89841823541.json and https://artists.proofprofile.net/proofs/artist/fb3fd4f7-047f-4b4e-b381-d89841823541.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).