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 0xe5dd28abcd718c017973d0ebdeb037147da7aa9f9d7fca0fdca32c3d10a905a7. 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/b3d3a2ce-4cb1-407b-8428-b85d4c18efbe.json and https://artists.proofprofile.net/proofs/artist/b3d3a2ce-4cb1-407b-8428-b85d4c18efbe.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 0x1b1ce84e90096673e90fca9b1bdf6cf231ec483a080fcb1202c78d132cca8b95. 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/TCAAZ1191942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99da6829ade15738846991b8a53dab940808a0f9049bcfd6f665f43f6ad71462. 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/TCAAZ1191945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf22e9243e05fe1b333f7f203472033452483ffe6e72d85a721adf33ab7140a. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PELP21302006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a972b4eefc9f02041c0b62eab855e7087a0740ccb550735e5b41eee72cd58a6. 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/PELP21302007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49decb4efc14a9a4ba3de5d0ce5fd6461827140192cf9d0ad5cfa3d0e6698f51. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/PELP21302008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c485b047913852ae34fcbc1c00c0ff7a68f77d2cae556be9224bb294df563c. 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/PELP21302011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef6031ffcc900126b9f424a335a4fab5a8b74661ba1dba4bfb5db1cdf3f2dd2. 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/USLF11500806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ebb56cfd48dcc8997963800272805436948d118d30beb3e75fff6b7964150d. 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/USLF11500809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa530635d0be5ff5a1c522a47283ab6b2d7f841ebf63c692a0c5554b84c0767f6. 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/PEBQ91717875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b5a219b98b8c6b496cbbb09947ea9420a6f7d9669312b8ba8344e1076e5da0. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/PEBQ91717876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b73c7ef8113193b1775d5bb5c4da8c009976e9a1dd240ec097edcba57d9fa0. 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/PEBQ91717881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58122d95ba24fa30e051b2d670bd8a407de52bf72d0044a44a14680198fc0f1e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/PEBQ91717884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb147314f16110101cb166be53cba2645d7df54a0ec9a580252964be1cf9d2a84. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/US3DF2201989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f050df45298f8ad99bd3d757dd9da9bc2d1295ebf800f6d730745614222eab4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US3DF2201993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53eeb910f75c19be02c59e6de98f5b895f7583aecb6ffbf77180f2c8e45da17a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US3DF2201996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bb69b2b0efa9076d7acb7fb93e05f8ed4ba9c00fbd4fba46e4db5b4ea053eb. 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/US3DF2202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a2844d5ca0844ecc920f8623bd789e2bef943f91eda4d1ec38d91626f5b40. 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/USANG2230663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1bc62d388ca1e672166d8850af812a9c80032dfb467090515587d787f00ab8. 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/USANG2230666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826dc3b133b3924ae12c406ad63ed62d5a7dc7ace2088a8e44836971940ba933. 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/USANG2230669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b4e1b20819450a682768a02d6c63bddd351d48055072505fc82e6ff7da5dd7. 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/USANG2230671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7428a350b1adb79a796d83208459977fec29f5b7df86e62a19727bab0d889eae. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USANG2230673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a2844d5ca0844ecc920f8623bd789e2bef943f91eda4d1ec38d91626f5b40. 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/USANG2230663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca041f8fc73a617e4a5da5485a35019f867bb42f3023c60974b0abaae55f898. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USANG2230664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4782c71fcbf18af8dd87da8ae4a8955cbca4c3f393d6c254cc9377ad6f07cf17. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/USANG2230665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1bc62d388ca1e672166d8850af812a9c80032dfb467090515587d787f00ab8. 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/USANG2230666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774156e80a79cf9dfa2fb3d753d4bb797d30ed9480588383be2fe8e807e374b1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USCGH2030122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1c1d769cd07f418d19f0ba381fe004bf41a5488aec5f04b226a04c414f055f. 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/USDY42080151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3cb4b5e50f6ce9837559caae262b149f8bc0b7a1937d5bd048b72efcc91cc3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q1944468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117cb5840ed02a52fe6ba681e544ecf78d5a47e69e6658f533faf77e2254ff4d. 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/USDY42080152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f050df45298f8ad99bd3d757dd9da9bc2d1295ebf800f6d730745614222eab4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US3DF2201993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bb69b2b0efa9076d7acb7fb93e05f8ed4ba9c00fbd4fba46e4db5b4ea053eb. 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/US3DF2202001.
Kultura Babylon (Live Session @ Leopold Studios)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af8f5e4b3d4065f20c591da62eaf35ed113885fca935679d136d33b5324a89a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QM3DF2217776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ba5c5089015be288cea0f26521d3d94af308f908e40353c1b7a1611529d778. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM3DF2255732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd031a35c8f88d79dbec7868f75d0765debc6a9e3720f214782a7b7000af741e2. 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/USANG2294806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f59d2b504a6485c40bb22d247e9641ced4cb52e73218a317b818be0d61d72e6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QM3DF2287581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f59d2b504a6485c40bb22d247e9641ced4cb52e73218a317b818be0d61d72e6. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM3DF2287581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0764b623931fce023f0a1153447e87096ae2ebf7f16fc2d3fa51d88e6f54a577. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/US3DF2416332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd7f9907f917c65531df9cbbb591f5527c5073724d822f660309a5dc412107. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USANG2449661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eda8f7793a6bd92be37a22ed719ef3e0f7acd122bd28870072e0578c57e1b7. 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/QM6N22262140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995c99caed539ad3d8da17818e0a18e22ccb038d0202bbbc43b82d45dda619f9. 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/TCAAZ1191950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5e3ede9395930fa81a82a31e2e1932bbb8ecd986b35025573a33a3969e0c1. 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/ES71G2310300.