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 0x8c25365a75210810088d32e463850fa3be059cb359fca847fd62d141e79e1dae. 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/329381fa-184f-4f8b-b265-cd605593348f.json and https://artists.proofprofile.net/proofs/artist/329381fa-184f-4f8b-b265-cd605593348f.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 0xe611334e50410ea774072e08e7a9fcebe032d41d5eabb9250d66530baaa8d3f2. 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/AEA0Q1714545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890870b18c303f7185ce22544bec788db7c8a8a88391b9a5f2fd243bec1505d. 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/AEA0Q1714539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20074d96841ad031bf10b515519d360483cb163c6b08bc1781ff3144451b858. 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/AEA0Q1714546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151b4d24dfdd291a206efecaa848c1dcee6799d01663f48c0f6cc8932fe59a5a. 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/AEA0Q1714544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe611334e50410ea774072e08e7a9fcebe032d41d5eabb9250d66530baaa8d3f2. 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/AEA0Q1714545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff93f201f27ded9f543d14c45b277cf777a63a042025c69e4bccfa05be3f323b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AEA0Q1714537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c90db54a40192f07bd42b3686e60cc2be3b9bbad5741e9f30ca209eee54c730. 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/AEA0Q1714543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e1fc9c22b3bd0718051cdb830dee638920f61278a74ec53f9a1193867a63ef. 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/AEA0Q1714542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351ce02f02f631e7b46c759854f11a8762d7c8a75e81665446679b1cd9d25766. 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/AEA0Q1714536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d269a59a4cad8b0841bc2d87f6850a33557c5561acd17117547fac47385279. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/AEA0Q1714541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b7dc030a7e24473a78d51d50c351af054fd4d216e288f06760d42cafe9d112. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/AEA0Q1714540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890870b18c303f7185ce22544bec788db7c8a8a88391b9a5f2fd243bec1505d. 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/AEA0Q1714539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8232470e5012693f9c0fbca33384f6261f57925f12b29de792146c6b13f8323. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/AEA0Q1714538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e3486f532933b51a12910fd6d5c529b1927e8f4caedc7fd010d4693079d0c. 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/AEA0Q1901019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2da2eb18c200a709c627a64300033ea98eb239e5f24952103c1fb755ebbc80. 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/AEA0Q1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb339b488f45b64ea5de57da04b8c7d586617ef4a4e22179d385ce5de70ae83. 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/AEA0Q1901021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b07940dc71c768969fd196736a0b583bbf4dcc614a9b0fb71f61f5aefba7d. 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/AEA0Q1901029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe078bc82acb191fad3c660e129f4546272adb834c1c27e84d68628efd690e843. 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/AEA0Q1901018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e3486f532933b51a12910fd6d5c529b1927e8f4caedc7fd010d4693079d0c. 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/AEA0Q1901019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2da2eb18c200a709c627a64300033ea98eb239e5f24952103c1fb755ebbc80. 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/AEA0Q1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb339b488f45b64ea5de57da04b8c7d586617ef4a4e22179d385ce5de70ae83. 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/AEA0Q1901021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a592e53db1f85ec369c179d1540bbc513e4d2961c60b15abb10adf77073f247. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AEA0Q1901022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac65d01b5d5e305f031aa1e965d451a9260a01522cdbefbcb57fa9b32ca561ae. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/AEA0Q1901023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef05cb3b350b68aa2f820c66859c425e4540ddef230d623843423a1a5010337. 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/AEA0Q1901024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f37d3da06b764865b2a6745df021c2a3b6ac9830eaa3bb37e0c9695de20a4ab. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/AEA0Q1901025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faf299cc121c1b60aadf3251c71f81545a9f3a11f0149bcfb87d48645ae8624. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AEA0Q1901026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce162a6229ddd2b19f8e1397085399fca80ba1fd3162c84084b095f74f54723. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/AEA0Q1901027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed71cce29de730685a2606efe2ae26e2fcba87592f082afdf54e5322f39d829. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AEA0Q1901028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b07940dc71c768969fd196736a0b583bbf4dcc614a9b0fb71f61f5aefba7d. 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/AEA0Q1901029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc736b789877618c1475319c383114037dce429f7340ea806d96c966ca1bddfa2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USHM81998028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc736b789877618c1475319c383114037dce429f7340ea806d96c966ca1bddfa2. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM81998028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8c3781a529cd749a9cf604ed0106e0837f33f49359f414f42958ff3b919470. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USDY42292791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ecc69c531cb0c449bb76bebeddbdd531eed0e3e1105069a5b7feece72c9980. 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/ARIXB2206713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb599059b687a9ce0552f7af91b532f08b6c40f06fc1349755d3ccc981605619c. 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/ARIXB2207121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8c3781a529cd749a9cf604ed0106e0837f33f49359f414f42958ff3b919470. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/USDY42292791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ecc69c531cb0c449bb76bebeddbdd531eed0e3e1105069a5b7feece72c9980. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARIXB2206713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8ce9f748944318565343d304bf5624c73080965fd5c2abe5192eb4fcb9ce18. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEYOK1621352.