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 0xf358745ec140ae636d5641e700aa5ed4bbd57353f3c1b9c4dd92b7e2627ae749. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc165ac0-043c-4810-b4d9-537754c42a78.json and https://artists.proofprofile.net/proofs/artist/dc165ac0-043c-4810-b4d9-537754c42a78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x8459882663c65a61e995d6bd006993406331913c5d7b5e5aaa4c0c408a093cd0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:43:31Z), 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/FRX087390015.
Les états généraux (5 Mai 1789) - 2024 Remastered Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa885220cdf8a963fc235e0d17866eac8a94106d6aa19629ac6e1063d1420419c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX087390080.
Français, français (14 Juillet, suite...) - 2024 Remastered Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bd9c8305cae359494a4376f1f1217ea0361a27af2c354f41e41b853f7cac6e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX087390022.
Serment de Talleyrand (14 juillet 1790) - 2024 Remastered Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7065de0920a9e5fe9c27d8b04a82e581ac7af2c7f850c774c76ef2d47e5a023. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX087390028.
Le procès de Louis XVI (10 décembre 1792 - 21 janvier 1793) - 2024 Remastered Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a56810c0cf8080c6a6131182e509bbd6f61cf64a2f865976c6d3e415f90a622. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX087390081.
Fête de la fédération (Talleyrand - 14 juillet 1790) - 2024 Remastered Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ee33e5663796052aed27697d7c7875978f219c496aa5efc11d072361dedffc. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FRX087390029.
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 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
La fête de l'être suprême (8 Juin 1794 - 20 Prairial an II) - 2024 Remastered Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f41b210e9e2149789d13e0e12ad61d1bf77eea0df24fdfeaa1ce2d79fe77be. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRX087390043.