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 0x5a7a6f03602e2046c4b2983dd430686d20876ed041658b4409d08203c6be5b80. 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/921f171c-fbed-429e-bc3f-7dd9e0918840.json and https://artists.proofprofile.net/proofs/artist/921f171c-fbed-429e-bc3f-7dd9e0918840.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Calendar Girl – Berührt (Calendar Girl Quartal 2) [April/Mai/Juni]
Calendar Girl – Verführt (Calendar Girl Quartal 1) [Januar/Februar/März]