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 0x006eeb34d1d7136ae59efbfa0186887e488e02926a78d39adef9176c9742e0e1. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94cb572b-f56b-4c04-affe-80c13ae640e8.json and https://artists.proofprofile.net/proofs/artist/94cb572b-f56b-4c04-affe-80c13ae640e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi: The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring"
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933b63c53a5648faea650aa47a88e4e8b233426a9070cae4664c2408c4586003. 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/GBAYC9005652.
Les Nations, Premier ordre "La Françoise": I. Sonade - Remastered
François Couperin: Les Nations (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8856bfb501aa4d7edc2820ee857ae4ba558c615cf4726e6c3e558d48b3eb4eeb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH4211800047.
Les Nations, Premier ordre "La Françoise": II. Allemande - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b37e37c93ebc87da86c97c06df71886699fd3af7870b0518869cdc41b921b1f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH4211800048.
Les Nations, Premier ordre "La Françoise": III. Premiere courante - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e17d9cf5c11ba529d32f060a4e8a1e2aecb367406a7a74e024ac07dbebddfe9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH4211800049.
Les Nations, Premier ordre "La Françoise": IV. Seconde courante - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057f2e61107ead0df178d0628d6ed5294d4dffbc636c116b7da37e0bea129554. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH4211800050.
Les Nations, Premier ordre "La Françoise": V. Sarabande - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188635892d6dfc8c0507f4e6371f86c4a8879cf781aa38566c2c22503505dae3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH4211800051.
Les Nations, Premier ordre "La Françoise": VI. Gigue - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b60f0af3093058314d69f4a43108a47ab77f998aca2f76ff2f97abed169239. 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/CH4211800052.
Les Nations, Premier ordre "La Françoise": VII. Chaconne ou Passacaille - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8174af6bcbe7f24111a84ee6abb8308ce75b2a157519b8e213aa0ace9332f0df. 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/CH4211800053.
Les Nations, Premier ordre "La Françoise": VIII. Gavotte - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe915f78e4fdff268414524aba383cce364cfb800945bebdcc273005d02430a0a. 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/CH4211800054.
Les Nations, Premier ordre "La Françoise": IX. Menuet - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29381451b56ead986abe94ba812709a472966fb31ccf05bc7f824261b4a29e22. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CH4211800055.
Les Nations, Second ordre "L'Espagnole": I. Sonade - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f672670c6f7127d07f1973419ae5a2dd6287e6d49c4230493d7cac072396349. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/CH4211800056.
Les Nations, Second ordre "L'Espagnole": II. Allemande - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1d13d1c6c33d00f54fdd79555b78852a2dadb5c49ddd21e6747d67aa22f103. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/CH4211800057.
Les Nations, Second ordre "L'Espagnole": III. Courante - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24856de7595a7b7417642affd169c6e3120d9af307b145ed0dc1f7dd9698f5a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CH4211800058.
Les Nations, Second ordre "L'Espagnole": IV. Seconde courante - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4da4392ffac83805dda077bb47c9587c06ab67604b3c71d19c8feaf2b3268f. 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/CH4211800059.
Les Nations, Second ordre "L'Espagnole": V. Sarabande - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00332dc507cae7eb9fb18e45d40dd8574b064ff2105f1ad7b03df14e5f7f90e2. 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/CH4211800060.
Les Nations, Second ordre "L'Espagnole": VI. Gigue lourée - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547c83b287e9c97bd46bfafcacb3abb6130f31eb6f45d9117bf1940b995e977. 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/CH4211800061.
Les Nations, Second ordre "L'Espagnole": VII. Gavotte - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cbf11f5fecf57cc30df787c17af66632ce562d49a684d583e65ce94a0a24cb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CH4211800062.
Les Nations, Second ordre "L'Espagnole": VIII. Rondeau - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b652cfb6bd4c6b10c6887efe43717493976e2b2d9681e539559a1e34e9bebf2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH4211800063.
Les Nations, Second ordre "L'Espagnole": IX. Bourée. Double de la Bourée précédente - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae32be8fe0ca04a7f42cc41cfddd16c3c4eae2e3b361a406fbcb53023582f6e. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/CH4211800064.
Les Nations, Second ordre "L'Espagnole": X. Passacaille - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9d697353ca7900d4cac38bf1e5710454b9127172445912bd471497c855488. 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/CH4211800065.