David Gauthier (; 10 September 1932 – 9 November 2023) was a Canadian philosopher best known for his neo-Hobbesian or contractarian theory of morality, as developed in his 1986 book Morals by Agreeme
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 0x0da2ac7a7c9cbc39556bb0d73e96c650be74ce0ea854116fa16a1855097720c5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d8a8f06-12ed-4f5f-947e-4d5a09d85e8e.json and https://artists.proofprofile.net/proofs/artist/9d8a8f06-12ed-4f5f-947e-4d5a09d85e8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gardien de prison à la Conciergerie (8 Juin 1794 - 20 prairial an II) - 2024 Remastered Edition
La Révolution Française (Bande originale de la comédie musicale - 2024 Remastered Edition)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6fb72b2583e73780d8f3d3d8dac62463a4679a238ba4f6f8524ba0c53ec78. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX087390044.