1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8de5878b25c4f2c3575c245bc05462717f9a3f253c066d2956555bc8103d122. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9d9c9f1-504e-4f80-99eb-6a2e77f91d75.json and https://artists.proofprofile.net/proofs/artist/b9d9c9f1-504e-4f80-99eb-6a2e77f91d75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dekmantel Ten: A Decade of Dekmantel Festival