thumb|A squad of Romanian Land Forces soldiers with CBRN gear during a military exercise In military terminology, a squad is among the smallest of military organizations and is led by a non-commissio
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 0x0e059fde335cc13fbdfcf529be7ba04fa59e313cb374c2f2c24e10796f003a12. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1576b0b0-8137-443c-ab22-e9481adc3307.json and https://artists.proofprofile.net/proofs/artist/1576b0b0-8137-443c-ab22-e9481adc3307.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).