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 0x865cc57eccb0ac0e23a403fadad74545081b5c3af2eea77c419c2db19411f2ed. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d66d22d0-e65b-4aee-8f49-5f4a0bd57229.json and https://artists.proofprofile.net/proofs/artist/d66d22d0-e65b-4aee-8f49-5f4a0bd57229.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Grimwoud - Het bont vliegt in het rond [Grimwoud (Onverkort)]
Teds und Nancys total verrücktes Abenteuer [Grimmwald, Band 1 (Gekürzt)]
Lasst die Felle fliegen [Grimmwald, Band 2 (ungekürzt)]