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 0x7058c380d7267978b7e745b964b3090cc214bef87a37167e09b5d54e59bc3d7b. 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/99838bb7-045c-49c3-a7fc-b51a8c9bcdca.json and https://artists.proofprofile.net/proofs/artist/99838bb7-045c-49c3-a7fc-b51a8c9bcdca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rebels Annual 2019 - Selected & Mixed by Dub Tiger