Raba may refer to: Places Rába (Danube), a river in Austria and Hungary Raba (Vistula), a river in Poland Raba, Croatia, a village in Slivno, Dubrovnik-Neretva County Raba, Indonesia, a town in Bima
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 0xf508c1fa93580aba005471135a915bcc151a07e443c60261a8ffb5800ed6ac13. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d56f4f2-8424-40f8-a4ef-5a6e6b847487.json and https://artists.proofprofile.net/proofs/artist/7d56f4f2-8424-40f8-a4ef-5a6e6b847487.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).