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 0x5b2c6a694f9e4b86c974b9b3a91d05af8d3367381f92226aefc8918175d09976. 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/54732c30-20d1-44da-b184-9a12fac084ad.json and https://artists.proofprofile.net/proofs/artist/54732c30-20d1-44da-b184-9a12fac084ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Västanvinden Sessions, Vol. I – Sörmland
Västanvinden Sessions, Vol. 1 – Jämtland