thumb|upright=1.35|Cola-nut galls (Andricus lignicola) on pedunculate oak, caused by a cynipid gall wasp Galls (from the Latin , 'oak-apple') or cecidia (from the Greek , anything gushing out) are 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46bf23f7b44bd74efcdaa2e815f04f304aeef73f6284b81458631423c0af491. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d9d439-63a0-4bc6-85af-e82695497e54.json and https://artists.proofprofile.net/proofs/artist/c4d9d439-63a0-4bc6-85af-e82695497e54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).