R70 may refer to: (R-70), a serotonin receptor agonist R70 (South Africa), a road R70, designation of the sole train service on the Aigle–Leysin railway line Aeryon SkyRanger R70, an unmanned aer
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 0xb4ea49560e13a7639220379541fde7ecdb06caa3e0dfc94cb6a9beff64ee287e. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f1cb78a-4a84-40fa-afc9-5a96a68ae389.json and https://artists.proofprofile.net/proofs/artist/2f1cb78a-4a84-40fa-afc9-5a96a68ae389.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).