thumb|300px|Map of Occitania in Occitan language, with the main cities Occitania is the historical region in southern Europe where the Occitan language was historically spoken"The ancient language of
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 0x2f630b5dec8437598f4d5b2d7f54e88988bdc5400a2454f9a9b3d7f8c3841c08. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42b1a1de-c7b7-42e3-8b28-7abe9098f7b4.json and https://artists.proofprofile.net/proofs/artist/42b1a1de-c7b7-42e3-8b28-7abe9098f7b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).