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 0x261736c1b780e52b1533a60041bfd65694d43fef9781571e401f3ff4eb05cc88. 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/fa0a967a-9b33-45c6-b877-f120a00c9e8a.json and https://artists.proofprofile.net/proofs/artist/fa0a967a-9b33-45c6-b877-f120a00c9e8a.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 0x91f1ea16a689dabc374494e5a87753b72d7bef19e528b885a94ec5e5a74c50b0. 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/SE5752100468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a7733c0cd81ec04cd2b52d0544e98b103bb55d265f4924bb691c076df93487. 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/QZMZ92196018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78b811ede6b7c918bbb10685cab847bbdc4cc1ecbe3405802da72718c6a745c. 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/SE5BU2170785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78132b5cf0cc7d21136c0d3fca8bf9e48fe061d4d724aed18bc6cd020d887ecc. 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/SE6SA2042417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981efb3347d4357f347d63c3f09f4aaf97c9cf1ea4bae380d38fe31e602cfce4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZTPX2106177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa80851579ee2945a29d7293e006febb79dfd91a9ffdcc5ac6e44b1fae6b731. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHZ62212421.
Una Reina en París (Version Español - Francés)
El Cultor de la Norteña (Marinera Cantada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4922019f91300cc6b51550d10bdd8934e982e514e811847ead34a9369f5c5a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZW9L2311427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534fbf2469810703d8c1ea904ae6e349134f9543cd5695149ab867a6d12aa5a2. 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/US7VG2425491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da687b3232c9e65e9c8ab5b573c866fb96b67aa8cbe7843193ecbaf917fa8c3. 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/US7VG2425486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18921bae73faae1e8e419dd1279c1e0dc6d0b0a34647115f1ed974e1337d12d6. 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/QZGLM2488960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a359125d465f07cfe3d16569a417cfee55f0bdb398f1e77f37d5bbd7238f87. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZGLM2488959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd93836b5c5968545d04d4450f9916d428c0f6c152be6275c2882de19d230fc1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZGLM2488961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26521134968064122dd69906244e15aab74e0bf3c64d690b8fbfd2bc7d507507. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZGLM2488967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1243886dbe1c4b3e0373a1faae0d6740287257c962e1ee661d911b69af788. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZGLM2488965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1143e1969dfe36d8a391ff6ae41a2d9f445d2f4ecbf057327a2fbb673f87d5. 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/QZMZ92459420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039132b6f98b9f7b798b9f99cd79d4fd2c6a9176abc2e0bcf4a4aaf74fd4096b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNJV2430943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed4a5760024a54102a703000b772b9e0f2bab41e1d0cd4d1fb22bdfd890914. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNJW2470215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad839078482473836304d0776cb0e6fa62d6d6e6325ac9f974c4dea80f3a539b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZW9L2491215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f73fe6ae869b528ef910cf8236246dccafb22d57b7cbba30804b94fa909361c. 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/QZW9M2457278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10dae389cac0afe76f217208254c0655b93f76c8f1adb5f45d1288c242bdee8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZW9M2459182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbb36d058d66421e4ee213209f06bc441efe6801dbdd03b7763a5b31205f174. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US7VG2597366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177c61807b1cbb907d0632252fbd86d9ed5490fcb73c5a099410c16950e7602b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJY2500731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf365f35cd99a2066a388f6e3e93cdca89b82e60892e97f5adab0a040aa9490. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2500729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213dd70e69db180aa8536e23bd15271dc93f01bc16d8babdfc40f7f4a9279d1. 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/QZNJY2500728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57db8e1cd71b534446e6527aaaa23acebb9c819ec9d9b4c2afd358bb3e4e47fd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJY2500730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09abcdb38f9961d67bb6d39bdca8f4ed29d5419ac2ba189fedb087221198a48. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2500732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a555ad7f4f1ae11c619f05c163e251bd7cedd974b5731c36b8ba208ee04575. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNJY2500733.