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 0x4c586c9a2769e0b07f997961fa289e59bffe19589d67a51bf54bb05a1cbfa052. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73b5e45a-f098-4527-b201-f9f5e8a9df4b.json and https://artists.proofprofile.net/proofs/artist/73b5e45a-f098-4527-b201-f9f5e8a9df4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xf39fdc54887ee9d2e2578d395a27d82b6f3876234e2df4d0e87a5f6d51dffdb1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHNF0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e06861933ca16d27a7ae691a55edcbc3a57b886e33a8b3c4792cc7e2693808. 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/ESA031424036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e62164722264405fba781cecf92d01b1ffbb7ac192a1716fb6dadfd97e552e. 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/ESA031424045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b08521baa7fe7b60d01659af47916427e32f35715cf7a31b0c41f6bc01718ed. 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/ESA031424065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04ec0e3a05df1642c38992fd7093d960777b182b72773f8e8609b5e9015317. 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/ESA031424068.
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 0xdc988e8362567e9656dc535e295cd5aa29260c6ff2d266f8457c7db94f490728. 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/ESAAI0195320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97cc87202ceac80ce0a11db05a985ee59d01d88e42793d38d13ac9724c623b6. 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/ESAAI0195321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d722bf138c448e2db59e1315e4348886f6ccf4a22a7802cb47d86dd3b7c9fb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ESAAI0195304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9786021f31c04912bd712fb659b24a2197c4912ac7caff8b1101ab9725798ec6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ESAAI0195312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e764437125b2489190d008f4207db644a6989972f6b2d258c29700f612802b6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESAAI0195315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed8ad17462fc4b7cfa8fe3a6cff8a019798b2bd521a6365f01595a6efc59cb0. 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/ES71G1507004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659811521f3dfe96a773186dceee316aae0d2da31b3cc56e0b53f9b50f5f897d. 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/ES71G1507005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4abe8804394b15eac5c61ebbd4e7c420e3e4de7e9853f1e29a954aa948d5328. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES71G1507002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28231de7f8e5738bd4ddaa0206633c891f6d8d0585fc182bddfc6fa16502d10a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES71G1507003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c90753a18866d991ebbde192760cd9b9eb2cb477820630f355f91f68a0c1fc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES71G1507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4604311ea489d0bd768e5fa7dc8be35f7171027ea43d81956257701f5dc5fd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES71G1507017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c310c883374a6b8ffaddc9c44f5f9859d9b543cbfb328a378b68fd3d116a85. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRVLS9900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c9172b759d4a9d9b4c53cdae856b4ef631a9861265f11194411debc7262fc4. 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/BRVLS9900602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8204286ab763fa3d442c6bb2ec4de6d0318971781af41db9eecf545845329c6. 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/BRVLS9900597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e2745d56c27ad81b2b108e0370a475f20c3c2500f410af3df1db8d7003bb7c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRVLS9900599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4488be5352e4537af2bbdfac4cb24dc33e3d91fa5c69aacbf23d9232b4a13d. 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/BRVLS9900603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d325d2f569e93841d7cf89b0da58b7b45f3a6b45431250c86fe999d09ce1aab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P2336781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9ef7d42a4d58b90a74143274fc7af896348102a0146c57f59bd06efbd8238a. 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/QZZ662449687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb2527e3572b057a66433b82baa0d2caefd4462ae38a0f6b9075e9895d3be8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ7361803428.
Orquesta Sinfónica Nacional de El Salvador
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dc57711134ab306671a374b8880cf9f3027dde46456d49519f9ee62edd7175. 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/QZ7361803433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbd6c0805383e99e07f02b8dc1ac9e4298bbffebfbb60961f5d6c4041285fb4. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CUA021611394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681bda18243a3dde915120e6286674511e5b37c96ebddf8960f95763177c06ac. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CUA021611395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08144c4a103dd3287a88b912705c4d4f0f5cdf21965dcba0b1312e39d75b7e83. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CUA021611400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667fbe7cebe3369613e4ea73877ca9e4bc187ab243e041f76deeeaf2ebc7e5b7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CUA021611401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c16cc037ddde6fbdbe777bb510df075a97f5fca3c7ed535d060a08f50ace21. 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/CUA021611402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1dbb41adb1c8890df00a9a299555cd7d26643e44ee8dac40c72de9942fa153. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESAAI0207755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f94f9783b0b9a69adf922641b774d78aeee8e88a780fed15b77d0af1285d51b. 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/QM4TX2376198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288da64e1ec4e9d7414b5de1171f8704ee167bcc7562d730cb5290c206ce6f6. 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/QM4TX2376283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439f1f0e13bcdde6cb60cba3309e8b2b516cf086f7d83b4f150a032109b86ad. 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/CUA021306325.
Descarga Pa' Gozar (The Best Cuban Latin Jazz)
Descarga Pa' Gozar: Grandes del Latin Jazz Cubano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13370b6e52ca8d756eb0adfb97e4b1db93a894f8a827d2287d1632b790df4e83. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ESA012055928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac339bd7226670c72c81ba5129cf1a8c4691ed34460bba49671b62ad5c2cc19e. 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/CH6541771139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f3f666e04b93e218ac1f99b05980a0ad304e2d9ba55c8f2dea8cce732253de. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH6541771150.