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 0x4a5f8a335677dfec242f1c2b1ee5e0295a44b521ecd34db3474170f36723eb58. 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/a78e808b-2625-4d93-b7b2-4d1ddcea77b3.json and https://artists.proofprofile.net/proofs/artist/a78e808b-2625-4d93-b7b2-4d1ddcea77b3.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 0xb667158a21559adb548ee6c0ba25612fdcc1938888cc71959239c17208caf9d7. 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/QZK6G2058922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a529a563afac6e1ec635d9b95eb48d81710347cb0b922272d338c19ab8447fb. 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/QZK6Q2173296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3010bcd763574fb1afe7aba604de0e86e875b8a2544ca562e9d25e7f6fef7ad3. 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/QZNWR2118696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d652eee1ac3d3dae84625234a7af993793ef8ff069cc4dc0f7c15e1d364c9c3. 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/QZAKB2167977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac92e7e60bfd7f20eaa509722c38c2529a8c9024dfd85bae6b9cfb6849641e1. 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/QZAKB2166299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cd2049e3d3a958c98447562d6d856d1096f973391c780363fea26f1419085c. 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/QZAKB2167978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51613d8af101b6c3d4931e69f0c657b902d6361c9fff965e4bc9143292e3e72. 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/QZAKB2167979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cdd3a33a0eed282aa86536f31ca8477df8fa9deb7f0074fdb33fe4ef83c14d. 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/QZAKB2167980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27619f521ded9b4bcb2074f5568f6cce419863b634e44c17aa120fcb7e574d14. 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/QZAKB2167981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0fd98e79ce46398bb87a3a8e5e666df3670d20322d537719e48cb4d78aa6d3. 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/QZAKB2166820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707d4b23fc35e50d6f2005f673fe40c5fee2603df0154c79ab321c92ddaae6fe. 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/QZAKB2167982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af24a03b9ac8a39b78976f9cefa937ab9db3c7062901240ae2e8b72d20f02f0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZAKB2167983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506d31247c095e8814af90152ec0564d8df8b6080bb1d241e0dcc47346bdf06e. 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/QZNWR2118697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51380d3be2a81b20d2beb08e878dcfe6210cf8b0801f8de37caba91254600daf. 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/QZAKB2165721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22049d7c3982b3afbc7004cbbcec4c209742e151de02be40d7cdbb13a4cbd7e1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZAKB2316985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605fab66fa7ca5e6c6ca9917ed3a72a73ab707d2d3c41d567e83ba81fdde6aee. 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/QZAKB2316987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8936152f126361b52c708db042147ee178046de4f0eb563686ba65e6793b2516. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZAKB2338767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce04427f9ddc21059d0dc7888c873ab425aecb85286a22945df1dd6c9c1d739. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:47:00Z), 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/QZAKB2338768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21baa0779f0e2caeaf392ec4757c7580d62ae8c3532bd18e5fd49e7d801a345a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZAKB2338770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca171ec94134adcdb2195b04b3ab177404db662592db767e2ad3b9bdd2b3168c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZVEM2356350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cf8725ce5a2c5b60211a99611c8e470be52c760212af1cb83a970b6ed308e3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZVEM2367025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa2b765ee6973b02d80b483d127cad2bbe6a5abdf423721a90fa02f9e1ee8c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZPEW2407208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf604129d3193e3dc47d8ea86f25eecb00d0face4c54d891c761753ac83680670. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZPEW2407209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad4e58f017b98f7adda67cb8cb305a2b73463bf20d9a24a6028ab68dbd557a1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:28Z), 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/QZPEW2407203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da832c967395fcdb2505f1651b4e849571f10c4c78ecc3366bb2bbed715cb09. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZPEW2478816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cfab1a8208a5bae8560647d3913bdbe79b76151d9ec226f8a8b0e47a8da9fb. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QZPEW2478818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556699b86415322b5ab6504fda8ed9aa9cba6ed7e6720dcd7e6f67a727b726b2. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZPEW2478819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b28586c45d15f52417f5ae92532f914f5e7fa89f20f8e2d817c48b558ea31. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPEW2478820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f590ec0b473eefad83d185f49add39e2d8d52328ebe589d8d824e8d7053dd0d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZPEW2478821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b1593be3fe274f2a7fe8d25eeef293303f9ddaacba707d32a32cb9a2855948. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZVEM1803930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d2fde2ca099d1ee4def26264842e7c05f75a303561513f0371ecd3879e58aa. 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/QZVEM1803932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9668127a72850422c4eb2645f2c1a330ad8555e3fe8de77d03588337ff94620. 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/QZPEW2521727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6a9b6da972afe181585dc56b8e8f82b2c5ce02d2254c6a3b7f613828870766. 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/UK6821653557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfa4c009bc914f09258766e4fa0cfbf95bbdaa12028c235e5f2df2aedbe176e. 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/SE5BU2387219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f49bb2d730d557e9f2e40c2e9ad545ab7a797d38700c71fc520c32a1e3047a. 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/FRIDO2414905.