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 0x2d4a5b5e35e510937d699ffeee312c1af9570e4015fe8472b25f6cb81db25f4f. 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/99d4f265-5e60-4a54-8f06-57b362ec1247.json and https://artists.proofprofile.net/proofs/artist/99d4f265-5e60-4a54-8f06-57b362ec1247.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 0x8b898e6156e3aa8908c7f8ebd89a61da8927771d7fff24292400955fb013824a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZ8LD1956149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de27f63ec4982d333fadcb28f96adfe5376704dbdcd22a6796c313bf9675ff7. 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/QZFZ71991398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d2452f3fe849853709ddb291292fee364f381168554b15d758a12854b28a69. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZFYW2074235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef58b0d882adbce711a118219e0a46d86d78aff094ca3f42ca9cabf65660e341. 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/QZFYW2074242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540bb3f3396b418fad5bf1b10b8361c432443ca7cc1a848d93dfe119800d8037. 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/QZFYZ2036552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2688746de57427bfb359c62b7cb13435532a90f542e81ff865b542409a4a3db4. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZFYZ2036554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ce99324f77e37022cf2ee5c7d444c5fec9481ca0760ee1e164acffb3566bd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZFYZ2036557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38f06937d2a5d7a0809959d50daa83945591d516850d8033f6f30f8379f40a8. 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/QZHNA2009531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da5f489d4909b925216c6e9d25ea731f9de05b9f5a1887f5025a4c701d3c37f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6M2006658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c89bd038f3f9ffb444c8f3fbd34a0fe0aabe8cd004789f64b36e68aa2f2ce71. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZK6H2008537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47093b28658bd5328090c5a605f06b992c84ef7f6e5a2ed0ba406fd3af2aea14. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6H2008538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c17b4306f6a1a6cf99cdf2d3116b06e509b2f894f4b8ebd94fbba55997fd50. 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/QZMEP2090022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3492d60f7feb9a3cdb3c1880be0dcf741ec288e50adc29c50f180bf556faa309. 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/QZMEP2088470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcaec427da25877e1c7b765481472d66b289ee2e805df843816e0adf4f8a4f3. 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/QZNWU2038373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f160eb8ab90abfb4d3618204f59f5e775c957e51e6b45d9ebc95cba1dc4ab6. 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/QZFZ32102399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc612ec849ebaa586068321e1607bd29ea1890b462bd2980effbaaf9d896710a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWQ2160967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960e7f2359f9f2d21f1e5154768abfccfc512aa6f4ca155c32b4f3d2f89c61a3. 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/SGB502219655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d44c14e625bfd964a0824ee74f7359b9b60989a3a8f89dc61bf4cde3605ccb. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZK6P2233409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca1401da3b349c6f8e4f22fae17fb7f4fcddecf6781fe19c69e1f55babb0bbc. 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/QZK6F2214654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0b433932f3bce8ef1d81f69befa7e3abca816cd0d849f423a78fb18c54c79f. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZK6F2214655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e9f68ff4560711f97e00b1a9ef95fbe529908eb3cd3b58869f1f18596a9fdc. 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/QZK6F2214660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61316a6da830b469319d8685ae264e9f6db3f5c12b94d6ba6c1c327f1dc8a8c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZK6F2214663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28e91f76dd751e14fc4cc8a6dfaf87924ae06ed0b5daa62b48cae62017b9d77. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZFZ72354410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cae54e0e648c30e6814e70d92adacc5a387aaf33be9f73290c648239899a16. 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/QZFZ62325384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a1a441f6994a7d3a87024907297b3fa9c9731ca90d329eefb18141346f2a4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/IL6652305514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f4c591e4ada422e54e35ebceba79c6d07b75fe8d42ea1209d6ca7df0def099. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/IL6652306568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d49de7029ce13fad701b037d8efd4752d1a7dabbb5d58d2be19b22c3b47280e. 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/QZNWZ2354147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349a1e0853d85e8b22d3e274b06ed94a4d37c3bd72240139ad918974604d6006. 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/IL6652307335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77399900fd512b9b1e36db561c3eb720c86672dfbfe8a6fc2ba2ae7c4f37f866. 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/GXBAV2316292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a338026c2e3eeea20fa432511781aa1ac23cfaea9abb550e0d1a9b03217f5. 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/QZTBE2321571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be8626147008610eea29492181a1539ccd1f776285bbe67907f970994bb6dd1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GXBAV2418620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b731cfc263f61ccede0dd7fec8d0435d15182153e8dc28fc2d6085cb8556a. 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/QZFZ42471084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf34f2c9683ace65f485bb61eb086b69cc04373dbb1ce0039728052750abc308. 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/SGB502498767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef881f2d2399ed0996f9418a21063ae928c746c1755a6f52fed409a106e1190c. 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/QZTB42477167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddeea62dc05f1675b5712f5d3b05ad2dacf116e2cc1435428dff6776f9ed0c2. 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/QZNWV2416355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7604a758159e67bf241a3759f3e78618727af6304c84327bbc4c8cccd5f551. 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/QZTB42477168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec847b59780ea7b8c8fad7bdf41f458d4bd0007e8e4f21c511416f838a9e5a63. 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/QZTB42477169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9489023eeed2b72046d1c69ecdd4b08080e4d3ed2e89c6d94f5cabf354dc0c2f. 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/SGW502259965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eef14e94998affb40b2f1c94863d93a2dd1116491e8b5666f95a165f064365d. 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/GXD7V2569305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e579959ca6a276927bdf93f798387d30072b362eab05dd3c92613635c4ab8c6. 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/GXD7V2523472.