Alcest () is a French post-black metal band from Bagnols-sur-Cèze, founded and led by Neige (Stéphane Paut). It began in 2000 as a black metal solo project by Neige, then became a trio, but members Ae
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 0xcc03963c941efa4fc496facb5f89eee05fdfe790a9a40c883e0c58a1b1aa3869. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39845add-a262-4414-9ec5-1451b0fe5b9f.json and https://artists.proofprofile.net/proofs/artist/39845add-a262-4414-9ec5-1451b0fe5b9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).