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 0x325666cfd48ee388ff160ba792ed6fb100822c6ae9c094d7e72e53b565d08b39. 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/e74ee102-9ea2-4108-aa50-7c9bf1bd42e2.json and https://artists.proofprofile.net/proofs/artist/e74ee102-9ea2-4108-aa50-7c9bf1bd42e2.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 0xe4ca8f33061d6c11344c135038d32a18af695a2ca5c9d4f0eb415e528fd49129. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/COC016101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7934340787b0111f3171b63745587e4f638d9603f3673ecd94fbef02c45134e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/COC016101163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6c1d8fe45cd0d08eefc6c95b22da17b37b5baadd2d7d7ed4fc5fa25af017ac. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/COF019000515.
Por Los Caminos del Ayer (Remasterizado)
Grandes Valses Románticos por el Dueto de Antaño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112c3f9fbdaa369abf59ff6b4e8aab7399624b60c72a08ead6dd93554c9d55af. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/COF019400824.
El Dueto de Antaño Y El Pueblito de Antaño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d201ce3f092b34cef3c392ea3e60b06d5f963a0134fe643548b08e3977dc43. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/COC016203923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646f2e393b41ea19f04ae775b8e8daa1f7d37625a981f3dda1b1129517cbee8c. 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/COC018610113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a53085530fa0c78c08bd4d387fcee060578026724419b3bc63e25bedbd75ac0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/COFC19703002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeb47bb6b2229c89bd8919993f8a45aeff519642e2daeb5f3101cad4aed4630. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/COFC19703015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eb5a5fcff66818a4246d2ae44b5852279bb452eba359c5aef81deeb0bb9b88. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/COC010007523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ae9278f1c188df10e7696f3b59536623b72caff57dd0da197cff929f1f01b8. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/COC010007524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4712634615fbfa777bf3839b14cf482ecdf82bc3dab68e98471385b2bae7cfcd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ESA031509746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d95cf115c1c519ac861130bd0872fd2587e626d69746354150e03cc14549398. 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/ESA031509755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5d1196148ad1b9d55a8c8086fd8551b4399286b4f4767e964c9089ad7b7bf1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7281506944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f6cdb91686d04929bfb1c6332c120e34eb3abae3ade05206d611258324807e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM7281506945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f3ee80aae3bbbcebccde5f55917637732a6b60254bc0a340baaa20eab8e5a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7281506946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8cfa351d1f4b1e78f9a276c84eec52567ac275184321ec022d402726025c8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM7281506947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c523742f8b50c31ae7114a2ac5f0728edd6632e2155c2a403a215cccc3f51c. 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/QM7281506961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fbc88bde607b8fc3fd31fad8117313ee567a48179c701f838fd9595f4defb0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM7281506962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47df3b4b60fd3fd997eb37d35ef7ec5143459bf270f56fcbb75e28f4d0edf0a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM7281506963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0497222d00b6f3fe817acd328413760e159cfeaf7650e1c9bb655c7a1dc3b7d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7281506966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85891b852cb4f6c99cf170251fe298ac8952f774c521a6e8f0775eb580586c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7281506968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca3eb67b2b83ab38b2e96a45a3315144bb32d92feec2e0cfa0e17797136ca32. 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/QM7281506969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c88aca9d75b355876159c011d3cb571fdca1e0e745790eb1c85cad64e7b1b4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM7281506971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cfa4913dbf68c37e351b41db921a76a23afd042dff8dbcf9b4a52e2cb96bd7. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QMDA61820211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e10599aa7c4be2c5561af82b7577012aab261df9a21ebfb3d256753a7764f00. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA61820217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7c5fc4e3b9dc443be2385869c2ab81e041aec70c1bc1339eb41b7230459f62. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMDA61820222.
Dueto de Antaño para Vivir Con Sus Recuerdos, Vol. 3
Rarezas Y Algo Mas… Del Dueto De Antaño Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9f23f1e9e1fc683d4afc52c4b0ed7eaf930cf7385cf7839df71f4052bb4a8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/COATT1902510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2792f22226f774bcf5f238c7471183f78c9263ff1ae602e395d21a2223f2724d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FRX872043033.
Essential Classics, Vol. 802: Dueto de Antaño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e61468d83f4f1804cf1cc39665f0227d7ea32476ce5dddbc9caa8de91004856. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES31E2504629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce911e35e50c5bf232ed78d182648370e4854dd5c67fe66f7ade6b02cdabd1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES31E2504641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e37c72772d4746a89be562db71945df4659df998f7ad15655ab369bfd4f5a3. 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/QM6N21453874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2380bf74a9c1d9788e6aca4e1f50d8390e8499e5d369d50c1427e0850b38bc97. 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/QM6P41550900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e795a5f4d0cf9c5185d41b6f388c97a9c427e2660ca57bddd2a7a7f3540753. 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/QMDA71868100.
Joyas Musicales de Colombia: Veinte Exitos, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84801fee4e39f2974214be9663090ee96ce9096961a004457cd06568c661f92. 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/QMFMF2141476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094bdd39b37c3cb724dce1725756cbd55aa41261a31062dca419ce9ebc2f0b9f. 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/COFC10910208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaf62dd275d7503adc36d0d13665ac815bc359d1c2e17d2dff60be9cbc9591f. 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/COC016203926.