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 0x2667b819e793da226edc5ac6450e841a9449de8259636aa4cd0f247fda320c27. 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/9d728ea6-a307-46a5-9333-69889879fe28.json and https://artists.proofprofile.net/proofs/artist/9d728ea6-a307-46a5-9333-69889879fe28.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Glücksbäckerei 8: Die magische Schule
Liane und das Land der Geschichten (Ein Buch über die Magie des Lesens)