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 0xc7a254e07d396909a569f4effe0e49359fc3b043b7b562be810ad5e36b770b43. 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/fd6ce384-4fdd-46d1-b7fd-fdfe923593de.json and https://artists.proofprofile.net/proofs/artist/fd6ce384-4fdd-46d1-b7fd-fdfe923593de.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 0x78edb9b2f8ae784b91393af8f91bb40290dc5caeb674918eb0e2189d08928ff5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2415966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96477b7ff0a39ba9aa4008b9066adca6d796b96d0e7efc7fc891d8613aa23678. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2599757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3cef4f03417bdd2d6013642cb4c66c966ce6d923e1332dcb604520a8a5b1c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2509739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd076ba384071cf119f39ff3ad286175941112dd81d660b02fd6cc13d4d9d4698. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2407126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46708c47d6a8f0233fe49655001bb1379621dbb17377769977d6c5d2aace8d7d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2471387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389a87c14877757c20a4e8a6d2887bfb9f9c5de7380a8a20f5859f9ad21136c8. 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/QMDA62408133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f462bc665473500773c906ef06a9d27d99adda854bb526bc681d32aa3efce4a. 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/USANG2424521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd2d859862211f912e0489d179a1e8e0cfdeae485df57b7d485d0302a23ba8. 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/USANG2426459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b533e3db0b67613def86af0a48f2003bfa58dfde0f0c24253be090b6f30d1ac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAT2412875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70339545a8edec1d652874fde6cae5882caf03bc05c08b990e5eaab457905088. 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/QMSAV1105350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499ac5206571d099a839dd683059f702f148ee6cc4650ae0387fabed2f41e6ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM22428809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5894085e3b3890b2da40d824c2309b50ea8509df98ca198c390ccc7540a2fdda. 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/QMSAV1105165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9bdb64cf068a6179a73e2567a0ac8edfc3d7b89a4852253f7a4fd51af81d4d. 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/QMSAV1105048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b572d35347a047b702625b934c90ca8ee89bc8d332ab8338552de6eab190d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA82421329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc138a9b8c561891a3aa843e781894894ad0c3e86b4e7f76ab6de03cd47faea4d. 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/QZWFJ2398306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c4cefb1aa975e19be7d8ae9711d878bc633e8fe58fd61535c2a18977740fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82371547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5429bfc22b2913bb2f4b252d540ecafc77dd43d878862c42893b3e061d05cabf. 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/QZK6F2319836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b97b07638a7f14da87a310889737d475f82e7ef500912e235639ac6f6eb48f. 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/QZNWT2353849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b1b4087c4c4dd92cc07bcfd9be291b644a86ec14027106fc3167fc648c18ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWT2353850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9658192efa90a6fb5cf0ccc74ce0d1444c94b2633206d44090321bc3af88ea59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARC572312385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5429bfc22b2913bb2f4b252d540ecafc77dd43d878862c42893b3e061d05cabf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2319836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2a06da743535db9821b506c284bbe715cad56bd1779848468847e03baedd7c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHB2347085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c57babdb3b755e1446e39f245b42e99d92cabc7e29b5213ce525257b6aa5c. 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/QMSAV1105166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5cb5b176d9003ae3a29dd44c4762c56460f7da7939fc8dc86a79c1062b472. 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/QMSAV1105034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b76e22b57708f42333fff4ac684bd1ea6344c15e162eb7f59382802831fcc. 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/QMSAV1105167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9195edf56387fc663811744c8cc1225f1342219252acb34d14aee4a4942f89. 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/QMSAV1104867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9bdb64cf068a6179a73e2567a0ac8edfc3d7b89a4852253f7a4fd51af81d4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMSAV1105048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e07d899d9cc7bb8ccf1b84e3785df528413604c4a9bbfb7507d008bf5afb11c. 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/QMSAV1105168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528b20443c0c396b7a9c9c777ff649c4634cdd20f20c9ffe0f06e74ba200d038. 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/QMSAV1104920.