Feldbach is the name of several places: Feldbach, Switzerland, a village near Rapperswil, Switzerland Feldbach, Haut-Rhin, a commune in the Haut-Rhin département, France Feldbach, Styria, a city i
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 0xa60dfbd7b3a1215ea9f36faca0bc3c329f9e2ccf53233ee698308afd9622e069. Chain 2 (Bitcoin): anchored in block 953869 (2026-06-16T01:20:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06dbdede-6eef-4582-8060-0a0885d44b6b.json and https://artists.proofprofile.net/proofs/artist/06dbdede-6eef-4582-8060-0a0885d44b6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).