The Survivable Radio Network (SURAN) project was sponsored by DARPA in the 1980s to develop a set of mobile ad hoc network (MANET) radio-routers, then known as "packet radios". It was a follow-on to D
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 0x524e76ec6fd1cfbc1dc67bff7920abd0fe4c9924b66b91eb6b880765ac934b73. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ef79e85-9e62-4421-ac49-ad2e8fe5ec39.json and https://artists.proofprofile.net/proofs/artist/9ef79e85-9e62-4421-ac49-ad2e8fe5ec39.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).