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 0x3258c99ecb1e2f7135dedaf9a8b72bf1e3b4ef925fa8cec225f608ffb954920a. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac4313a1-ecef-4fd3-81c9-1aab108cd91e.json and https://artists.proofprofile.net/proofs/artist/ac4313a1-ecef-4fd3-81c9-1aab108cd91e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aristoteles (Die menschlichen Gemeinschaften)
100 citazioni di Aristotele (Le 100 citazioni di...)
Wijsheid leren met Griekse Klassieke Filosofen 500 citaten (Verzameling van de mooiste citaten)
Lärande visdom med grekiska klassiska filosofer 500 citat (Samling av de bästa citat)
100 sitater fra Aristoteles (Samling 100 sitater fra)
Aprendendo sabedoria com filósofos clássicos gregos 500 citações (Recolha as melhores citações)
700 citas de la vieja filosofía (Colección las mejores citas)
700 Zitate aus der alten Philosophie (Sammlung bester Zitate)
100 citas de Aristóteles (Colección 100 citas de)
Lære visdom fra klassiske greske filosofer 500 sitater (Samle de beste tilbudene)
100 Zitate von Aristoteles (Sammlung 100 Zitate)
Weisheit lernen mit griechischen klassischen Philosophen 500 Zitate (Sammlung bester Zitate)
700 citaten uit de oude filosofie (Verzameling van de mooiste citaten)
Aprendiendo la sabiduría con los filósofos clásicos griegos 500 citas (Colección las mejores citas)
700 citações da filosofia antiga (Recolha as melhores citações)
Saggezza imparare i filosofi greci classici 500 citazioni (Le migliori citazioni)
700 citat från forntida filosofi (Samling av de bästa citat)
700 citazioni dalla filosofia antica (Le migliori citazioni)
600 sitater fra eldgammel filosofi (Samle de beste tilbudene)
Aristoteles: Die nikomachische Ethik (Ein philosophisches Meisterwerk der Weltliteratur)