thumb|right|250px|The Wyndham Sisters, by John Singer Sargent, 1899 (Metropolitan Museum) The Souls was a small loosely-knit but distinctive elite social and intellectual group in the United Kingdom f
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8811eeee54d72222a97849bf342ead4ad57f9d48e9a415868c30d4dd4e539e. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99147dd7-739a-4015-8472-7a7ffa6642f6.json and https://artists.proofprofile.net/proofs/artist/99147dd7-739a-4015-8472-7a7ffa6642f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).