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 0x497c99f74f0ce798a4e789e03c6820b3d0a8edd77d48ddacfb470095a2932d19. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f829aa7-77a6-400f-a0d7-c4444d11a65c.json and https://artists.proofprofile.net/proofs/artist/9f829aa7-77a6-400f-a0d7-c4444d11a65c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Behind The Wall (Tiefe Wasser Berlin's Singin' Bird Dub)