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 0xf0aa89dcbd8641898bbd313a25ab549bf45b3d9f7e98a8697273c56bd6841ec6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1d3a53c-be67-4c20-b4ec-8a98ee1ea83c.json and https://artists.proofprofile.net/proofs/artist/b1d3a53c-be67-4c20-b4ec-8a98ee1ea83c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Solartopia - Am Anfang der Welt [Solartopia, Band 1 (Ungekürzte Lesung)]
Solartopia - Bis zum Ende der Zeit [Solartopia, Band 2 (Ungekürzte Lesung)]