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 0x7f97f39d1c0d6595b4b7ab4ad96f6d4ca03c58f90022b338f04d70a2f662a2d3. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c47c3001-980e-482c-acae-30bc7ee9c21b.json and https://artists.proofprofile.net/proofs/artist/c47c3001-980e-482c-acae-30bc7ee9c21b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die anthropologische Periode der griechischen Philosophie
Die kosmologische Periode der griechischen Philosophie
Die Geschichte der abendländischen Philosophie (Teil 1 - Die Antike)
Die Geschichte der abendländischen Philosophie (Teil 2 - Das Mittelalter)
Die Geschichte der abendländischen Philosophie (Teil 4 - Von Kant bis Hegel)