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 0x9bbead01eb63a8ea1f6541f13ced8e0e54a2e98824ebb8b6b46d3f5085eb7460. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43467848-ac8d-4f89-8dab-e9c73d841f24.json and https://artists.proofprofile.net/proofs/artist/43467848-ac8d-4f89-8dab-e9c73d841f24.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 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 0xf279041531f30e389f989a2d06d91f34552a8a1c6dbdf1ca9dfdc18817c54ac7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEXO42490960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35b0f1138d99b6f6dc7dd1c8e643dabcf310b5bb7632f2efd3595a936ae86ee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEXO42490968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7570331624eebb8af5c0399e0f41f3465a7c524e75dac754eb04ebb12a69bbc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/US78T0502963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbc2e5915b6effb5f0fc459b61b33632493c7d5685b3bc44f8fc9846411f8d2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US78T0502964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b078be72b5be0d541a44f5d01c24b54c53c9159ed93e4aaaed044921fd5229. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US78T0505611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a2afacfd778d425c012b2946f40d583246facc2689371cbee98a1a2133cfb0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US78T0505614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf3d2ee7ed7030d9cc38a5fdfbdf8b8aec21bf00f1dbd9f7f92be7894c0af8e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US78T0505615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05267d5c745a526b464637c7f79bb449ed6c9e1418123be7647cd6dcbc3adc1. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/US78T0505618.
Carmen Delia Dipiní Con Johnny Rodriguez Y Su Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe810222c03dd7c02c609fbb70f39dde7a7fdc01143c962e082a99db913c4cb9d. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/USDBB0991658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629f31b7c2b213e18339f6512e053b34ae3c0027b25684466482840c5aec0d7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMYW20400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d57c24372b278c3a13ec241fa242eb23b2ed6e7b734985e371433c25868921b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMYW20700635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381fa22b4fa09d27acd24303a100c46888458e5c427bfae369c1c028aed883f1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMYW20700637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d37810a8b12d2b96e0fa1450e5418949aca58fd4d2aaee69604e0a1cb826f9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMYW20700639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968465ed2927aea955a31aa17e1ef4082a6fbba71a6c842edd7d1db9a3203358. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMYW20700643.
Dos Gardenias - La Cancionera De America
Carmen Delia Dipini con Johnny Rodriguez y su Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722d0382822416d73a2f250975e7759a4565ef91b21e67c48a4d141471d68192. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/USR011010352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44f6a55a6de0d269f4502d29d7f6fceb7cb917994e921c3216b561797388d73. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USJE61612155.
Bolero Delirio - Carmen Delia Dipini Puerto Rican Legend
Essential Classics, Vol. 966: Carmen Delia Dipini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081ead108b47bf927e2a531127f248b88d983f3034ef012e9f4d17bc7b712a22. 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/USDBB0605619.
Centenario Roberto Espí: Conjunto Casino, Vol.8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d1fd72d8ce782312ea7522fa1efbecd7ec55e2c3827ae771e7e252dbf573ca. 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/QMFMF1336481.
Centenario Roberto Espí: Conjunto Casino, Vol.6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eb73dc54d0ddb4bdfe5cd5e1445d1156622c88a0410b11e43527e3e8399882. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USV351358314.
Album Centenario Roberto Espí: Conjunto Casino, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a2c9a64df17991a9711c9fa3b2ce99ccc5595119fc13b66cd96580731e1870. 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/USV291376780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acff124d2d5a328cb996686477aab0ba748fb00ad00839db0cc85169c194ee9. 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/USR011010421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf75e649fd1c7f60194513598f3e9cf285292d44423a53df49e044fd36e7cd2. 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/USR011010438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba4dc738417bcd47faf7160c67b5ad3be0c95ea188b3ff2697fc8528958e28. 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/USR011010458.