The Residenz department store, popular under the acronym ReKa, was a department store in the style of reform architecture in Dresden-Altstadt Waisenhausstraße 16, on the corner of Prager Straße. Aryan
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 0xc5a7ce0d3e71af9d1c1e442a7a12744b868771886d04329d5df7466e974bc6e3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/900752a2-9ebf-407e-8a9e-1d749186d89d.json and https://artists.proofprofile.net/proofs/artist/900752a2-9ebf-407e-8a9e-1d749186d89d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).