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 0x354bc50cc76b873692ad94e70379758df70933c95aeb8876b837a1dc598331f7. 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/9058fcb4-e3ee-44a3-99fd-bf198cb52e3c.json and https://artists.proofprofile.net/proofs/artist/9058fcb4-e3ee-44a3-99fd-bf198cb52e3c.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 0xa42688e656fedc21800e1f89785286d148f5e07fe44c8e22e1172923c5af54ef. 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/AUMEV2328792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e42e12eba0fc5d8899613c9090c4075aa1fbe51e677cfb0854e43fe2399ca5f. 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/AUMEV2368598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993acd455521db04a707900eafd22ce965b791b6f32058e7ce8bdd7849fdd1f. 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/AUGBT2363597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c2e8c4dc801f49fb482899d6f4c4f6874e572a0a6ea30052c64f14ee8d9c4. 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/AUMEV2497601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d0f039eb5ef70c3d0fcc975047b16210c78459fecbf7ecb01bd756b17f16b8. 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/AUMEV2469203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cc99bc6c149abc284d26dc24b4abfad346311368334e307a4a91853549d0b1. 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/AUMEV2452119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35b2acaf68bf6a44d8d331155a05e5a270ebcb51aa39d058d810dcb66e8ff1. 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/AUMEV2444578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fba6a52d9f3386de7863b6c5bbd802e9255afd84d9e7dd39de355fdee30cc9. 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/AUMEV2431685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291f893a63906c9421302c05c9a0a384956a5c94814c81946cf99b36ef685a02. 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/AUMEV2410527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbae56ea9d7b69b696c15eeef44d8496cbfc91da8b3e8f4cf4a4ab5303171c5d. 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/AUMEV2410117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2fdff09eac05b67cdda0213ac73946e4fd2beacc5b4ce29c5744271d8f56b2. 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/AUGBT2307690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f8791ad544f311555bedb17ffcf06125d4306345b7d2e78a104fa7d4c2cd6. 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/AUMEV2394670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3a11b80fa276a1f9acab4a3c3cacf54ea08ea31c5794b51a669439df57f627. 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/AUGBT2307936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5a932a3b79e39691098b13513208813377e0cf281436553815474801d15ee9. 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/AUMEV2381705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9257814359692c17b380ca18734294dd9d73e10027c5ecafe3474a37b91336d. 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/AUMEV2369307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e8bb7a9a2c60dcd7b32dd245d6a7b0bdb88968a170181c9364f52f75b8ad66. 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/AUMEV2339377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6178d3ae262c2242fe9ccac18342365786e9469d16cc558509081d8b8b5f3cd. 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/AUMEV2345792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad34d01a04d925e2b535c1978c75d2a90a5943f66fe45ee39a6ce2fa24dd240e. 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/AUMEV2331235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae881b970450816252c4dec390ddc424d89dd5220e47d8feca57b590e03acffc. 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/AUMEV2314375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa741bc0dfede079f4f64e0f246c508446f18f3120831d022778aad03f04f4994. 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/AUGBT2241776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a0a1f60b102c03757dfe7be60defc771f718c6efb6ddca7c4f24144735bca6. 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/AUMEV2305452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e592fcddfdbef42bec10d3cad424e7b29b1bb152fa32c0787444fb2232affbd. 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/AUGBT2241001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfea619b0adc36b85ee4992f117f2b16eab328a4388eb2b761fa5bf39fe39f9. 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/AUGBT2207220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948837996e3bad4e6d879a5fcdf7d8afbf61e80c48f1ef3c4f7e756b0dba88f4. 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/AUMEV2290254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2937ca1ecfacaae161d13007e508c4a7e3bd5eaaec4e920d0cdace0f4acb0cea. 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/AUMEV2277375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff8e1c64788462b1657776d16158a485f2912106329e33de8ae968c23dad07d. 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/AUMEV2261949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284fb7b79f308a613da41d742dd95330024e7a2b62ac638b8e77b231b2e50167. 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/AUMEV2254930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04154c1826b304d8e7d7060a1a4b6268d0ca0b76e3a549e4834be404a70ed4. 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/QZHN92200583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0224273d0241629f0806be8a03daed972477e997d0e4c1dcb3348294928496d6. 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/AUMEV2234066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed327620011cb69336d8458491e3a5f9342d5b280096bb98e9ef19313f48f42c. 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/AUMEV2234815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048d691e960ae68015bc99871d92559a83551c6fb045dd881f706b41a9b31cf. 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/AUMEV2224204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b8a20745d52099d231c1901747da069ca951e82459050ed15d33bec8d3518. 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/AUMEV2226862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fd2cd9b738f8b8f45d079f9e85de49c98ba24499d535e74bd8a833628346ca. 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/AUMEV2217725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c792a0afaf1b35e0116fa417d613316cfcc5cecd04b3df43352225708a3c39f. 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/AUMEV2211552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe44cd7535a5e81447fa765f7b0427b57d2dc417d065339f4395c54a967700b4. 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/AUMEV2203451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f868c7ed0c84382867a66d9d514a564089ae2d14db5f929cbbc45c838b86525. 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/AUMEV2575336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3244e01f990aceb4e0d931b75df20cf4983b9ed5ea6d163a9a23d2e83f8111e9. 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/AUMEV2563043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce30bfe26707b2de5fc55c4933f7edba9ad61abbc8ccf958dbe5ce4e6e145987. 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/AUMEV2548497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821aae4fa90f17f06a8a224451f224998e6f9e0e98a5c309cc30d978ba29cb3d. 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/AUGBT2484902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94740dc01b523b6d80cfac1c3e7ac094772690c280b50451dff5a888cc479c51. 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/AUGBT2455288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dba25ed5d170b43d2e0e6d48d163e4dd77bd9db6926c547d8d4b14f4f77c75. 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/AUGBT2410860.