RERO can stand for: RERO, a library network of western Switzerland Release early, release often, a software development philosophy
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 0x14d272c0af388fb93eb556df5742faf1f5fc1a80eac345f7395d3fbe00407799. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73d6bed1-8a0f-422e-bb92-72b33396bc9f.json and https://artists.proofprofile.net/proofs/artist/73d6bed1-8a0f-422e-bb92-72b33396bc9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).