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 0x60bfd4fcc2f2c5c001cb681bed5c955e269a8e60ded711e2da56b2046f853871. 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/0587bd49-9b9b-4fc3-a221-36a03db02ebd.json and https://artists.proofprofile.net/proofs/artist/0587bd49-9b9b-4fc3-a221-36a03db02ebd.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 0xeb19da7b9fb6e3c47d48ffd821cac0862993f20da9a298e2c5f018a69b9788a4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USYFZ2166001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c3caf4882e13d0537695b82f8629bf02afb20528ef11a87b139ded5f87e027. 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/USYFZ2166003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994b8ad2f243ea0451766a3f2ab03319c235e1ebd72c6e9497200c044aef845. 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/USYFZ2166005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc151b3b865dc52fe442fd31c3ad48c5019798f7fa310b09de9a692919030243f. 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/USYFZ2166006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8985e55f76076b3ba3d7a7937ca69f1674f29f1d374be0252aec108b4e6dd92a. 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/USYFZ2166007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3cc68736171794314e561b63b2e1c813561f9f8122724a773f5239fdf9e98a. 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/USYFZ2166010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b41f17810ed2fba430542f70b8aa6fb37dccf95f54c9032a301d3f628d3e17. 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/USYFZ2166011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d56c1f2ed51491647dc4245957d615b99b6d222bfc2093bd54b31a23fb23cd. 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/USYFZ2165907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6378abd46e7bf368a5d10ecf60fe97d3d7b3b1f1ddf6d73871685740d1a6a1. 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/USYFZ2165908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e81aa4a8a3315b6f9de3621da0a1816de6894e919578fd5959f456ec2de5f. 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/USYFZ2165909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1739a22165b41b1010848f63ebda242e5b43f5c04ccf79076edd5299d69244. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USYFZ1448401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae049eb56b4b79a8abfb349c83cb26047cec1d622571502d2cfc67321c4566. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYFZ1448402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2ef83bd2efbdadd9cd3cadc711fdd04ba512680f3017371debc6df6adab282. 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/USYFZ1448403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd403d1ff25084c540f5e158bf62b4bc2afdcd09d1616272d55f2385e5a9fe658. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYFZ1448404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3d9ee07276f42a7e1a931042b80490d11b8ffa8322640a23324800d129355c. 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/USYFZ1448405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310b45dd5924e9c5f332a18bdfc3c702c83b9059730a841c1d04c488af0138de. 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/USYFZ1448406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6984fe40c90dfa00565a34204ddae9c1c125f25a5da0c684fc477ad6a4e5b2d6. 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/USYFZ1448407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d58e6d542c0b9dba3bb4828fe865c85e518ef61e3342e103cf92cec0a74716a. 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/USYFZ1448408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2af1f7c0c6d678f4945123a4ece92c6ac5ac9ceafb821b206c3fcb60951fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYFZ1448409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3045e336bc39bc763a21765568c3dc02f88109ea0d07377fbe6adf48037e5. 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/USYFZ1448410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92c29e4b34549c1018189cc18a393642ff2447a74a462f8ce456cfd825074fa. 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/USYFZ1448411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c25faba5f5de9101a1b2f4f039d2b2d216ea3538378ac70342d0907758060. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USYFZ1110401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2405cbe57faed7c2207979bca21373404f0bea30e7320fd9f0529250a27c2d75. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USYFZ1110402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff41454548a45f6b397ec056c4dad4025871ba8068f9bea14c97d3acab294c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USYFZ1110403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036faf5a3989439d1ef3224db4090b46f0fb21eccaeb67bf65d6dc26f6adefc5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYFZ1110404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0953c55e741c606392f30c5c419c304aa108be97e4247296d959a7f829e47e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYFZ1110405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a24df96454c91c8ac66576d0d28c222deae5d530e08c355970243c83ce316c. 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/USYFZ1110406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a2745ee2c9969d96ed044d3a8842277bbd4464ee98c6f35f14c72d8ab0224d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYFZ1110407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d56e18008732f25d5424e9940fa256b5222ee72b91a623b90deea45676cc6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USYFZ1110408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743dc06e6b309530da85efb88a32778c026cdba66229f0f0800f79d4bed765b4. 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/USYFZ1110409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ee922461e2204ea633edd1e6b25e057210610c46d5e79513aa52b4e90f0d59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USYFZ1110410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa351614692159ae266bb9abad26550be61414660fead3fd0eca1c5c7fa69af. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFO2146692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89205af1c17de2260ba709700e8735a1b71700033be26c5d145218f27d4e514d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFO2146700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f577b926f193a15c1657693e6bfc90b0d2b86d71aa8614ba33d4c7a851fb5e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFO2146703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd315e09b381bef95ebd022d931b33d7986ca0ce449b79c528361585f6c53cd0b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFO2146714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0e67565eb140813f9b3bbf926a631d7dc0a19780b503e861290af8bce77a12. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFO2146717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf76aa2d10f1a431bf6b59383db72a4f72c48bcde5ed08272567965460c76fba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFO2146723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa351614692159ae266bb9abad26550be61414660fead3fd0eca1c5c7fa69af. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFO2146692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd2dd405ac7ccd87fcc511bdedc4c31fbbfa7990b29d7e94224effcac49f606. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USC3T1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedec8a5bb78d2525a088403eaf456a342e9ffcbbf39081f4dc1676ebb739ce9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USC3T1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a6be9959c059239dcb07dd0b43c7110d5e3fe8035399fd2fa46a10a9234938. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USC3T1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29a50911cc62f2c165c2500a162e6806ceb0d3888a569a6e312f67cf66b97d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USC3T1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf2f871c0cb5ad13f0b107dee5b118a817a22050b3a6d74ff1ce94b526e088. 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/USC3T1000005.