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 0x4d58dd8b84e5ab2ad512fec83e3ae76e48a6d6dde6d95e9210f6239dd6eebafe. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8a2f737-5bd7-47d7-b50b-8010033b44d0.json and https://artists.proofprofile.net/proofs/artist/e8a2f737-5bd7-47d7-b50b-8010033b44d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Softcastle (Nick Warren & Nicolas Rada Remix)
slEdger vs Big Red - Whats That Thing Called ?
Strange Pill 'mamma Doom' (sledger Remix)
Bored Marsh 'alright OK!' (sledger Remix)