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 0x1caa3877dde7451971d39f331f49a87b85fb230a44fc4765ab1c97f7e2507801. 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/ec674194-5940-4d23-8be5-9550969e204f.json and https://artists.proofprofile.net/proofs/artist/ec674194-5940-4d23-8be5-9550969e204f.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 0x8df31bf3a3301f675e65185a3f722653e1eda2505c40aecb7e1ac966673c99ce. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/ZAS371000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953793a9a63adbb8603b6d0edb93c362cb78f387d466d4652e402f7b792db5b9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:44:36Z), 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/ZAS371000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e71f18aa33c63c9c960adb90067800c017e2b42de7745ef0d5dd5305823291. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZAS371000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81be50964758719f82f30d906de2ed5785d51c77c96aa314031653455f178e6e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:33:26Z), 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/ZAS371000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188d4bf147b3780ad9da25d0d7ab2c5d6152c90e3ea345f048d84cd0d75c5b26. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:25Z), 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/ZAS371100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b7cf1a51994237cbfcb62e7d21ef75081d1a106ac15f06f2b84f8a98e994ac. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/ZAS371100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c4b070ce4e5ffd9bf6061e0298126287f6b442bdcdfae2bead8bab98d472b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZAS371100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e88c3be62df349347e6cbca9c60b595eddd80315ff9b84b84492b36b9bfe6d7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAS371100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18518a8868eb1bf43839b4bb32ae47d45923def9d1cb38c0232bb17f6de49cf0. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/ZAS371100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25224bf3053e1a454da77939d561c6b81a9d2e2c3a5179e7bd2d1951522d5ad. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ZA56E1500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe73895a6bb4be561f5d719ad23447a5f5356f72ef1b26a0fd023924e44cbb81. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ZA56E1500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dfdb18a1118a3b09c53699390a9026c580da5dc6648c328fac8b80412bbaf9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZA56E1500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d0f32a7574efbb099d9123256e0799e67b5b4b757558ab5ab93e9eb5c1bba. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:33:02Z), 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/ZA56E1500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412059071ae805d6be577f09448b39ca24ea429b33b8c2198eae86351b355591. 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/ZA56E1500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949d23c8e96d4cfd137673c38cb7dd24fa0fa0348284a7702eed3a92834a93a0. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ZA56E1500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8931c8e3f65fb7c9eade8f86fc3678c337e535beeeca17f07d1f3d052d9745b8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZA56E1500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502d423dae08e6528cf63a9f8b8356f1cdde1eff947104165475a941a76cdca2. 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/ZA56E1500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be28ba69bdb1243bdb2a346367193d78a38f28d7ee2310d47044d9eca79ad5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:55Z), 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/ZA56E1500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1653d56854bf512939e8752397fa74e3371cb4b7bd17372b6c25b6ef2add7b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZA56E1500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf8a16290670a5072d0f0d0b0650ef9af26e173533a5dcf088ec860d54c3a9e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:44Z), 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/ZA56E1500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80947673a44b10564789f729cfccee515829e787440282a04ef88c5107978df. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/ZA56E1500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62545b9bf8820fa4fbb168709472b8fbd6d77049d53ae705cb0afdaeb6ac07b. 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/ZA56E1500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf22a10f85acbc9f7bb19ee224c937b001e8fdce7ed5f4aba1f1a0ebcda8f3. 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/ZA56E1500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0687f289fb21b2673b4a43d0806c5ec9066205af2e14c81c01fb4b98c04c8cf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZA56E1500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daffd9c555b3ebb1de67871d2cc651a756b4288367b299d28c77b3cc629f729. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ZA56E1500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da9e41648449f483e469e108941dbf69600aff5f7e43c4fd9a00c6cab47568b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:15Z), 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/ZA56E1500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168c8f7a36f7ac1b7a11b1a39c7210cb60fe51e44b5cc9188c84df204c1fe6c4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:06Z), 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/ZA56E1500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799400218e0c2742b0eff9211bd023355cbae8a388a2e92f4083a19d7105b3d7. 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/ZA56E1500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8360ecefefe68e74f208c16840a92c1ec770147097c98727808e3501704c7e. 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/QZTB72594499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663fd06c4294b6526c7bb9f5dfaa66fcb8a3beffbd2eba643bcb41f0f0bae567. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB72594501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec2758086613a912401a5a16965b18be98fcc35429bb33a3346fecb468e1004. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:39Z), 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/QZTB72594502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2d08c8af9bbf0911697f3f345098061cc57e533a45a4885b70dc3ed0ccc1f. 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/QZTB72594503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bbd2994e51e934f8e68bd606befc0e32a381ad2a9f99345b296d8aff12d3bc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB72594504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41250a234246fcc724dd320b769e44e474f353557cf711d6766bacb1acd38e35. 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/QZTB72594505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0c3ae72c78a2b778618b77e6e81472e5515199f114957ea7c3bf38f9473fc7. 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/QZTB72594506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80dc4b434568bc2b9629f5a2e5d7e5d64a95a3ea00818774a6ac8f197a14110. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:02Z), 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/QZTB72594507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae885ce9e5c956e5c711f7183f35499f327dcea09b1217e213d04aca0a29cb16. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:41Z), 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/QZTB72594509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b89eb4ca3fc2b63de425f71349baabb2f9930776dae3b4b327dcd54beec95dd. 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/QZTB72594510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c8c4e3eb34c8f67f37de55629621a75bfe890850a1bcb8afe9b05e083bb2e0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB72594511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87527f03f610a3746b7ccf9df1d3e60c056a8c8f2d3e31353aad04b97c8a8da. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZTB72594512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fcd5f93dab70b6e266347b94316351876b28baf7cb0417a50096820c482724. 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/QZTB72594513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa571f6d0d2937fe2c035f26f27dab24765ed4898400e6aabcfaae117c700f0c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB72594514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f39f7e46d3a30c1f6c539df9f26cd5434a277c9be332dac459e97205c59940. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZTB72594515.