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 0x5ae9672b89835ff6c85d57b49d36899a3c6af94def043665911a45f63ea4a0d7. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2f39d37-d4b4-47ef-a8c0-989a6f55598a.json and https://artists.proofprofile.net/proofs/artist/e2f39d37-d4b4-47ef-a8c0-989a6f55598a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).