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 0xded990fee1a4c4c813b0dcbcda7f7e32cd0a59568ce87afbd1b478d3e0cbb347. 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/44e41321-9f97-47a7-a250-a34ee4e1cffd.json and https://artists.proofprofile.net/proofs/artist/44e41321-9f97-47a7-a250-a34ee4e1cffd.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 0x98938a43dba0c8e7256fab0e8cca0aab51cb05b896e659ec92d75cd0e29efe9c. 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/FR10S1738926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec707ba98dd611fe31345bad7c75ea114dd43845325ce3bf63ce487f65f2348. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/FR10S1738933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78afe1dde6728aca3c22418bdb7480b7d76ac05d1eb0ab59966bf5134b00d4de. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:27Z), 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/FR10S1738934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e7dd48bbbf76588990afcf954600fc329c7ca6230d8478e176d71d73537513. 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/USDHM1625027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f77785913c97633848ea496a63012f1d8c9af581b55dc0ea7311ea2f1c5ae7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USJTQ0904003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8017abc41cd4140de73d89621b5f4494ec983c29a386de175171c5cff81416d9. 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/MXF019601270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d02a1bb2666deaf59376944d0799039698bd0cbf5fd455d89259098ed039d5. 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/MXF019501606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64551005d10fe746184a4e1fe83c5c64e40830cada5fca9e9dbe9c541bfe3821. 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/MXF010101179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915aa91c2f1e5c122f4a58c6ad655ac08a9d60b1f4e5ec06174ff3b4f52b61ff. 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/MXF019501610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5da69861b527c835aad6472538f7777dcf4e62b80518c5650733b6fa42d1c. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/MXF010101177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c02024e1f291317f43a1a39ccc5248fdebd9f4b15adc699f4d9bfaa72d1fcf9. 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/MXF010101198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98124dfcac3ef8c935202624fe7ce6d5b9f5a88b421f4a4553ebda578f394d2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/MXF019501607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3311cb050d7f9bb76d81e558d9ea4fdee4f9f1d993d08cbc183d6ed2cb63cf82. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/MXF019501611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe609b7be9c56d79b60b42e4fab204d01b2c1e83037655c29d351ab38229eb460. 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/MXF010101193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6afd87361dc8e68596e13c3df36d046c03305025a6c44c819b36055a3d68d7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/MXF019601266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2ace86fb627fa6f5519e35023e0f2530f0fcc4291ede608598e2afc3a6b902. 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/USRMK3029003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a408d7edc22e23118532860d2d52a6e865514ff7b4400969d4231249c7fe7d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USDHM1421717.
Mano a Mano, Vol. 6 (Norteñas - 20 Éxitos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaa39237b803a920d305687a9f47e9e3bc1355644795de74c1c9801df58adbb. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:18Z), 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/MXF550909987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cfe68ad277e11578e9fb27ab502409afc6486800feec550d8504d4e9b66248. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/MXF550909988.
Pedro Yerena y los Gorriones de Topo Chico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f962ac956aa8844bdf80a886db654f8c379451f88f086c80df8960e0df42874. 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/FR6V82130664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b825a0d3403af0cbef245344c3871d0a5c4e499fef2643e883358f83324a81. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX991529012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e7b1c4b0495f899ffcb2d1437644efbb9a346f82f58fde86964e10449cb141. 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/FRX991529013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8c8880a637f785b48be581dae05f8a6d16a99f5e2015324fc72bc3cfa81a89. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/FRX991529016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa59fbb4ec9cb41f7e917b50a34c24d2d4d7459df54f593e2cf354b8d525717. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMVRR1600663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa963d4d5934b66dad1de6d8b46e94693b5525749e8342935a9db694be55c17f2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMVRR1600666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8321207831684f21b16812fcf57b1b77a47971394f89e0cc8c97f80bff80feca. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM6DC1733646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f00a0067d4ab0d22634898ed1f3d8642bfce9454c752efc963a2539c865455. 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/QM6DC1733647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00b1931b988d46515fcf71ecfeacb743240691175d582412cc380c450247d26. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6DC1875532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e7e0738059501fb18995cb430007d3fed314bea6c07e894a3b39a402f4b76b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM6DC1876149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9b329ab71e991e194ee75c930a4559bf4615e8a736f26dcf074e7bb11f4635. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QM6DC1876151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd673bf6d6e567dcad580418daac051134bd4f3a7bef81acd0fa76911f3bb9bdb. 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/QM6DC1876154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d4e857887c26f37da3bf59ae8fe8797ce595d8be9584096a1927a44552df4c. 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/QM6DC1875552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8e20cdb3a0b68a9602ffff8e6c15a2eab34322ae20bc5d1b338ccd992056e0. 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/QM6DC1875553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab525c14bdab5aa36ace4b0c6c0f4d6e0b7ce485210296bcb10a1d1f9064eb. 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/QM6DC1875559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2631da214802ee321effebcf0fe7d59153ffc3ecf64d46e0c3b7b2b5b0ece22. 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/QM6DC1882403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abe2122053143ed0dfbb829d2833d5da54806312514f6ed69571dee55a23a62. 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/QZDQH1805720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200ef24227d62b6b069f475e6bb367c8e2773d9a5785c6b1f9c38399668da106. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZDQH1805722.
15 Exitos El Tovador Norteño del Topo Chico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a068ec4461d43fe74286073aee09680b70d49d4b2dd7099db069bb2b1cb16b5. 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/USDHM2101558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0604b61335a147fcbfacfc7c510a22ed0f7f42b7cc7fc4da73d8805b27214219. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USDHM2101562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ae842f5ee0af71bd84b72af56593488f0cb1c3eb4936fca424db74a5af291. 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/MX3192102472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa998dce3334c9beec9f4682c43a98ca12e086fe8403a2aef34038edf06cc20b5. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:10:15Z), 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/QM6DC1875544.
Norteñisimo! 15 Exitos Regionales Norteños
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec74961de4819b50d73c67341cbfc3ffbb1b786d83ab77c50258e930b3f99d6d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USRMK1000310.