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 0x594390689958f75dde27dda7cc37fc2280f59bc60dcf8450b3741f9fb8edc8b8. 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/a60dd435-4e0c-4f24-928e-8efb1ef45f11.json and https://artists.proofprofile.net/proofs/artist/a60dd435-4e0c-4f24-928e-8efb1ef45f11.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 0x51b7b3eeb29739775760e133dff5205164bc59f661c3ec36e92aac816f979d94. 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/BCIH82202800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c62992d9a9f30935c3334a8ffd31a9669782c70ea96d3dadf46586d939a108. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZGLS2413993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffadfabf0013015e751f6ed3934fc91174f04aaef2dd2eadc906b20428cb575. 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/QZGLS2415241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b78b175f10e5ae67c8e091bf2383712e2fd5c316a510904b972998dae53673. 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/BKFUX2301592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89aff0736489e6f6ef62ce0cca9d88ccc461b55692d7886f7324fb27af1e88c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BC1U32200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b8fcca3b9ecfe15795fa0b0b401adae038480f8d7e60ab1e5beefffab8f4cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC1U32200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254cc53f0ed6c267e5825b06a444808a667721299252d9ceebd9f5c9d999b163. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BC1U32200417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fbe0057c87911394a831b242efc24711e64cd79e1264e77f0e385b583a241d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC1U32200418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54245c26a8e2e821f1382782cafaea065a6cfc9aa974189bbbd948a925961ea1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BC1U32200420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c6995676e52e2de6297deb27886177575539140135810c7a655d944f8bbced. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BC1U32200421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af1dadbb886fdc6d15c5212becb37a9561c0e6127483476cdb6851e8739090f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC1U32200422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd49bd286d2e2ba28828de52cff9514fc911a694036cdef18fd8a8fd982cb5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC1U32200423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c059c842cb6254bf5db89a9301846ecde785fd7e298ed9c76616d88bd9dc2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC1U32200424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ed174c36e0c16df442ba09bf1e6d8c36c83d82002f92a7286dea8bd144698. 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/BC1U32200427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f747952b7781971401c33d7190ef38362c851d2cd606fd54bb80d00a308f150. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BC1U32200428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cea05d758923d0d9e60cee0ba7e758253df1bd97c2858397c03b8d49e214a9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BC1U32200429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae8866e49030ec9b70b138f3b67dce30af0d969569a352c5792d2dad3d922a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC1U32200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e192472d11f6af1d8315a735fed5f6a1f4ead0828fe4dcfcee1c108eaddd62c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC1U32200433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b915bb738970d7094730201851d7a4a3241fc37a86e20b65dabfea9c7dda1c0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BC1U32200436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eab54e4faa42d8f75bda8705fd71d7b0aad48d495a95ab37723c5796c5f0f3. 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/BC1U32200438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a85fd0187446a4ec35d7528bcf54d62c9e8b6a4283c55575ddff2bd3eb62990. 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/BCE7P2401543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda811c52fbac9d2407b6659643b70acd7aeaadd28940f70ad86444c56a653ff8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJY2432349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56a9010f318af82a67a518894e7887e250ba5acb0f3d0a822e8383e8d5dcab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK2242400989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e0bdc7bd2025c04b3210737d7b15c708021c6de97476ec50c29d52d11c90d1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BK2242400990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9cb826695b5f597a466bdb8204cffa26630f903c170854e342169730b26cc0. 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/QZNJX2489614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ca2b65087f4ce32e566abbc4fa56a2b1926f3b0c061bafb20ba0dd132e478. 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/QZNJV2461897.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fdc7488ad9a57ddb4957715773bfe4a8094149119386fe761074ac0b6da894. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMZ92475585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad764c86ced9096a69ddb9f8e09ed6fd9ed5232a45396dc37dc6b474885e52fd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGLS2480455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473fb1b0f3ed117a9018f24298c98da6f7b1e3052a5bdb44a9fd9deb82ec1cf0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2457640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa609f35be566ba6ab4582b50f0de6c5ab20da8a993653b3f0fb727e82d1c2b4a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2454431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefacc5fcb3e00e6b02bf18faff11b047e1b104e5192db88b14b53367471fcb2c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZGLM2412682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb4e3b4944aa2224fcc55cd300894587e25368f9462c6e38f1e1a070e86ae93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2412658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78fbd3fe77526d24115b4b7c1de5386894e8415285efefb28217d37774e6758. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCIH82305026.