thumb|upright|Small spade for clay soil; the other one for sandy soil and loamy soil A spade () is a tool primarily for digging, consisting of a long handle and blade, typically with the blade narrowe
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 0x0da2cad8f512daf4e111068088cd996f363fdb3ad15eb0c85bd66330605a50bf. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86f7cebe-4cc0-47f7-804e-92dc287cf358.json and https://artists.proofprofile.net/proofs/artist/86f7cebe-4cc0-47f7-804e-92dc287cf358.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).