Bleu Nuit (English: "Midnight Blue") is a television series that was broadcast late night on the Télévision Quatre Saisons, or TQS, television network (now called Noovo) in Quebec, Canada, from 1986 u
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd73f3ba1506c58e2a88f1ea4c4b841e8398f14f42c1da53189f0f3296da91. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c035005-c56f-4ac3-b444-784d8f2c02ed.json and https://artists.proofprofile.net/proofs/artist/0c035005-c56f-4ac3-b444-784d8f2c02ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).