"D.I.S.C.O." is a song by the French band Ottawan, written by Daniel Vangarde and Jean Kluger and produced by Daniel Vangarde. Ottawan originally recorded it in French. It was first released in 1979
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 0xa6537531478c4d79169ffb033524d8b19aff4405ee837d8b60450306736aeb41. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbfb24d5-4202-4d9f-9be7-8aa4d825b810.json and https://artists.proofprofile.net/proofs/artist/bbfb24d5-4202-4d9f-9be7-8aa4d825b810.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).