Poésie Noire are a Belgian band that rose to prominence in the mid-1980s. Their Belgian origins and tendency to develop a goth-oriented, synthetic, gloomy universe with low-pitched voices – Poésie Noi
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 0x178a91aac16decfb6e8c084e6a0acfe93eea303ae329408a7849485769c6abcb. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e06761c5-fa29-4468-ab86-ccc38be4ba97.json and https://artists.proofprofile.net/proofs/artist/e06761c5-fa29-4468-ab86-ccc38be4ba97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).