right|thumb|A remove before flight ribbon on Concorde landing gear thumb|A remove before flight keychain Remove before flight is a safety warning often seen on removable aircraft and spacecraft compo
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 0xa40f4c049b5c11a0519eb0ef00cf954df235d6ff772a6a0df9201935c9a34b69. 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/f7cb5a80-fa7f-4b9c-9ba6-3c0b02b5a2b4.json and https://artists.proofprofile.net/proofs/artist/f7cb5a80-fa7f-4b9c-9ba6-3c0b02b5a2b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).