thumb|An old Nixdorf ATM in Germany () thumb|right|Smaller indoor ATMs dispense money inside convenience stores and other busy areas, such as this off-premises Wincor Nixdorf mono-function ICA ATM in
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 0xd4fae2a63ecd163a6303d81a547a76b9b295df86b9d245a88a5ea0c3e158ace9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77bf062b-7b29-40ab-9b34-1ba0d72319f1.json and https://artists.proofprofile.net/proofs/artist/77bf062b-7b29-40ab-9b34-1ba0d72319f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).