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 0xf9ac842cc93824c5592f718e50d832aa99695b9a14b65abe4d314ca9345f757c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4588d411-48e0-48c5-b8e7-abff17548cd7.json and https://artists.proofprofile.net/proofs/artist/4588d411-48e0-48c5-b8e7-abff17548cd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Requiem in D Minor, K. 626 (Paris 1804 Version): I. Introït
Mozart: Requiem - Paisiello: Messe pour le sacre de Napoléon
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 0x80254d15fa93864af61c8e341c42289f06f94664d955999841bd9c0ac68ebe20. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR50X2291901.
Requiem in D Minor, K. 626 (Paris 1804 Version): IV. Tuba mirum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27188dccfacb8f21f46c05dea8fbc4300ebe84744d726ec4f1da2197d139693. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X2291904.
Messe pour le sacre de Napoléon: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9d3f26af586c1539410aff1aaec59918d8bcfa3b6e3c49f25c459ba9ff4b73. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR50X2291910.
Messe pour le sacre de Napoléon: III. Gloria, Laudamus te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e44be5d58b3eac4363d64c36f0c2be85593cb6134e9abff93eed62a36caed0. 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/FR50X2291912.
Messe pour le sacre de Napoléon: XI. Et in spiritum sanctum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b964481d07585bc23d9a12397b756851d69c8fe8b8452af44181ff4dd22a746. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X2291921.
Messe pour le sacre de Napoléon: XIII. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04d2ff6a32b9f82e938751c9029800262796e00ccef925add87164357dedd95. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR50X2291923.
Ô mon bel inconnu, Acte II, Second tableau: II. Trio. "Ô mon bel inconnu"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a7c68b59342e36042d938319dab0c96c7f53bc22135c86f3636d990bc628e. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ITJXZ2000415.
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
Requiem in D Minor, K. 626 (Paris 1804 Version): VI. Recordare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a0b6e100d8f21153ea45c18c97c5b9a1153924d6e4ac997aab3a4ada28efc9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR50X2291906.
Messe pour le sacre de Napoléon: V. Gloria, Domine Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa565f4ca9c1f26608ca8bfc8a8019f8c57fdb6a475ea459c849dc53e56655d2e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR50X2291914.
Messe pour le sacre de Napoléon: VI. Gloria, Qui sedes ad dexteram Patris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5efbe1faaf28ab57d46218a1ce6a0864dd33f565f93b17b8f774906429b401. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR50X2291915.
Messe pour le sacre de Napoléon: VII. Gloria, Quoniam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa651ee25231b3026e5cadee44174a774f02a3bfb40a6157dba893b2a0eb41f23. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR50X2291916.
Messe pour le sacre de Napoléon: VIII. Gloria, Cum sanctus spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13afba43ef4818dd26b62d71e10fe377406a98d6a6eb0f22176554229da7ad6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR50X2291917.
Messe pour le sacre de Napoléon: IX. Credo, Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf048f8846e8b64a13c8db9d36d71ab27f3ffc1db1287b289195c79806440411a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR50X2291918.