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 0x594aa4278ee55aadd0c0b437cde4f78868c0c460723dc7605b0a7bc5b104f366. 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/98ca69bb-fb4a-4a71-b758-f3fc534b638b.json and https://artists.proofprofile.net/proofs/artist/98ca69bb-fb4a-4a71-b758-f3fc534b638b.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 0x950097a93107f2a7083a0612785eb13b7880ffed122757e9bed23c295a1dea40. 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/US38Y2308921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915938710848efec27b1da2958dcdbdb40de37105fbedafd009469ef8186902a. 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/US38Y2305172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d46bcb71fc23cd2e52eabfe6cddccbf57f510f1c008073a9a3118a6b18fa17a. 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/US38Y2300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1c6cb05604b13a2838ff7234f041e9d7c85fc75fe19f691c7ebf7cf2702352. 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/SEPQA2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a9162e35aedfeee45f81efabd89da5f28d38f85b3901711c2266f3ad948f1b. 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/SEPQA2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf095ced320cfb9e30f49f6fab258a803b94310aac323ca93a192f5645b4f4. 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/SEPQA2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1169946ba8991f648a78f8c0b13ff54afce55053540ef25a8f33bbf1b49db7a0. 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/SEPQA2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b59b2e2b8ded69d1e891a8be0b57e4cdd7ec678d4dc8f17b705c1e2f55328. 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/SE6XX2307472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524ccff818b56824d47595a0cca9394806c9ba09c78443876f17ab6e9f097d5b. 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/US38Y2407465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc247b7e5b18a39ccaa3eb676c94cee9c1f431d80a5774edd5b60b7af956b29f5. 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/US38Y2404253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03de6f1b38d06ea416fc0c6ad947f7375d179a1418ed0656de0703f0fa5ce401. 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/US38Y2403232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b59b2e2b8ded69d1e891a8be0b57e4cdd7ec678d4dc8f17b705c1e2f55328. 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/SE6XX2307472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa048b8bf7ca73f3a93bb148ad980dba73e840871b2f676a8d0337e17759caf4e. 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/US38Y2416449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2753e338f418a8c7ad7df18aa2909f1777bea768c8e997d45e9a6b842b7503b7. 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/US38Y2414264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d4354e5484aad39efc84692e4acad7425b48306acfac87d5a6e5a2e062d575. 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/US38Y2413056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2c6524833db2c1ef7850ad5ddf39a4ce771ff79f1bf668c773ef3caa3df36. 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/SE5XG2405682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86714bd9b0b6c2f3bafb0e75952344dafd1aefa160072e88ceac43393c51c4a. 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/US38Y2410415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7ee942da340de1f0c6616af7d7977c8c21c4856c44b3838cc27c6ff4d33a59. 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/US38Y2408481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d862cdc9514209f35fe7b0159e6aee48a61551713cb0a2a2ddacd07a6c5b29. 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/US38Y2426501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5b420a85fe7d307fe1d5d084b606497c8af7d17f89510911ea6bee7f626445. 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/US38Y2422060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda17d7ba5b132caf23806622fb55859851bd05d60f7bab62ffe38170028d86e6. 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/QM7282584147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa24fefb9c236a4c9635b2893f94e2996111dddd4c4914aef5ca5269843fb2b. 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/QMBZ92536065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd42009bba3795aad758a09578ae77c1cc27cf1d471c01dcfde23ae305563ef. 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/QMBZ92536089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3dd22c1a49453d94d135c4bf9e891686c454e25bd83d89014c205e391b955f. 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/QMBZ92536104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22561972bb3b03ad18fd56828e7f6f25def36aba15f63ba637167c74f9751db4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:05Z), 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/QMBZ92538138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1be23a74d9ca9164160455e7595b42cfbb2dd76e90243fe8fff721565555da7. 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/QMBZ92538150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65e90342f8a20cc66523a74cb3cc96fe82d02b508ce5a7182db142e1d8cee37. 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/QMBZ92538158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727c4b7f0973c3d6506fe2e0c0c259fcc1219c54b29593faf1ed956e52fc220e. 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/QM6P42561500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880234f8cdcadb1c9b383d3e980e10c65e8079b93a9e87a7b4291c741e9b6c1a. 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/US38Y2526158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe900e21bf0e3805aa0288d6b11be3db795f022ec98c95ff7a392112ec842ad5f. 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/SE5XG2503031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce2a27305c067188691d58b2fa785c619cb385e141a9c20491faf476a4cb402. 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/US38Y2505264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50afa5ffa123245cc4f19a9c81ea51e7d0fe505d71d96dd0ea375d9a42099ea1. 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/US38Y2431981.