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 0x64292fc9b264d90a3a4b3d86f3d63327af91a14f4a3aec1b0901d16936d9054b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28022c32-e91d-4c3b-9715-5e6d5f203a31.json and https://artists.proofprofile.net/proofs/artist/28022c32-e91d-4c3b-9715-5e6d5f203a31.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Andro, streng geheim - Fehlermeldung: Schule [Andro, Band 1 (ungekürzt)]
Andro, streng geheim - Emotionen und andere Störfaktoren [Andro, Band 2 (ungekürzt)]