thumb|right|Dikkie Dik book cover Dikkie Dik is a Dutch series of children's picture books, starring the eponymous orange tomcat Dikkie Dik. The books are drawn by author Jet Boeke. They feature shor
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 0x652d31898f6aed48cb3feb98ac0b7275897491e749695c55f58c11df9c7c4c93. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f7b3650-3170-4445-b596-bf5ff2115a83.json and https://artists.proofprofile.net/proofs/artist/2f7b3650-3170-4445-b596-bf5ff2115a83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dikkie Dik en de Verdwenen Knuffel (de liedjes uit de film)
Dikkie Dik 2: Een nieuwe vriend voor Dikkie Dik (muziek en liedjes uit de film)