thumb|Weinius at the Östergötland music days in 2009 Michael Weinius (born 1 March 1971 in Stockholm)Sveriges befolkning 1990, CD-ROM, Version 1.00, Riksarkivet (2011). is a Swedish operatic tenor. Af
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 0x1cfe18e62b9d2d1bbf4a53267d85f9b57a27d72daca6ad6494789e94960bf295. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e87e918-a82f-4d12-adb1-12e4db71b3c7.json and https://artists.proofprofile.net/proofs/artist/4e87e918-a82f-4d12-adb1-12e4db71b3c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).