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 0xb2d21532d8d4f40efcb5a4530dcaaa1b33ff8c5f7d25aa50336f72ad1d2507e0. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26aaef3a-0dcb-4c60-a9d3-058b8ae582b5.json and https://artists.proofprofile.net/proofs/artist/26aaef3a-0dcb-4c60-a9d3-058b8ae582b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bussi Bär - Eine aufregende Reise - Folgen 1-4
Bussi Bär - Das große Rennen - Folgen 05 - 08
Folge 6: Das Kaninchen und die 100 Delphine
Folge 8: Kasperles Reise zu dem Teufel mit den drei feuerroten Haaren
Bussi Bär und der Ausflug der Schaukelpferde
Bello will auf den Mond / Wenn zwei sich streiten
Flups der Storch / Bellos Abenteuer im Wald