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 0x9afa44d6e4292c34c0d16f829d3d94885dce2ca391040015194f5f5058bafbff. 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/da0be40b-8e4b-4418-8f01-2f8ad263dd28.json and https://artists.proofprofile.net/proofs/artist/da0be40b-8e4b-4418-8f01-2f8ad263dd28.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 0x598605a3bd078b9bdd965097b1f588ddf692611ee6888e9401d5deb2870e1954. 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/ES71G2327999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c9d36a62323f3291e5abbf73977c75c84e001949a3fb346a780c248311aa6. 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/QMFME2392944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2431b50436985c1a726dc5e6eb57839dac2076fce6c554f899006e217f59cbf. 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/QMFME2392945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d8cc391fb14022d7e81f36f8f2beca3601e0926f6521d3097bfbbef7ccf98. 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/QMFME2392946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ad2628557365b49b7dafc3e779595540e9bead18f9ffb532c9c3f104b3023. 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/QMFME2392947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97383ccde689f12c5df9d35ba6eef2bafbb862b468efb01e0c24131c4a7afe8. 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/QMFME2392948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203c79dedc2192fc93f3e3a63e6604a40a5034d1968d77728c37312eca159e80. 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/QMFME2392949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c2131f47ec1df98d74019197d635cb854ca512755c98660d8bc7a7b51f1c30. 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/QMFME2392950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b29779f5265653dfed4b600b5669546315b5ba25b7946b066bac1a882f64fb4. 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/QMFME2392951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bd63e2382e0eb2f8e7a63ccb9d4ab7dacf561fe55dadcb3869aaee3e595732. 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/QMFME2392952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f97eef217d1d2649816f796606e9c2369cfc791347cb20a6bec2f772f85efe. 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/QMFME2392953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ca082c2776ff473540b4cac4f28c6e7525956bcd3c0d36998a98843ad6ba69. 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/QMFME2392954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa987f11c5645a9e12e1d233313c9d943ed6d7cef92c9e93cd58edda82300aa14. 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/QMFME2392955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89d5cf1ab448fe9108b032db176449e97802c2f0c0ea1fc1628d566624c81d. 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/QMFME2392956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402220308516014bd645d19bfd02ffd5ccaaf81c94a09535dbd47eedaac80fe8. 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/QMFME2392957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fef64c8c398e8c4114b16144ba0f258820e422c9c28e4609a0da078aab1e55. 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/QMFME2392958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86db5e24c367ca1185a845982727d39e69f7ef5a391f59facdd65346b89d03c. 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/QZNJZ2477762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07790b720faa4cc24a0682e45e7884de1dfb5b2c5dfd5f271c855f2bb3570ca6. 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/QZNJV2448572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99482e32131425ce3e7e9a5ce5f87815fd1328ec331546859f564853081f0b0. 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/QZMZ92483657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6d090087aade93103d2f6b6666dad63abb4cbdbf8c701db75a3c26ec5e4457. 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/US7VG2425892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc8433c2c36a96442871afe6b3b469f01767974b54f57e46fb0ea9eb190593. 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/QZW9K2387767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1575f7ee9d756d65fba70f10d638a9141649d217b9379c857de2cb56223485b7. 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/ES71G2428650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae51cc0322909d73556c1f31238f806f15fd8fde335e53a2e73b8ac64d6889f. 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/ES71G2412915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab69957b069a78b6c212a454e11a2ba4454f1d17ee731311054711bb0684350. 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/ES71G2327116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8391a3ff4c075d285c01285feeaf40eb5284745b1e0705d89dd9cd8ce214a73d. 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/GBMA21874927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c21d66a4c12f2a5b4ec8886a817a564f8aa7a036df766e5edf73fb6bd2df08. 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/QZDA52280732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14deeca382666531e01a5f81d0ac3d2dcdebf969fdb62ad0c917328e71e4db4. 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/QZFZ42280863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bebbb49f7e154127de08b666cc0fbdc0fb583c72385a68d296c6a4464e7fcd. 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/QZS7J2236736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e883c347c666079af5916babbbbc22710247a408022447de8844e91cf007354. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:22Z), 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/QZNWS2145815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2a21d4e87ce27643f63b4d91a1aef60d2004e53903f9a8d7c134153b17472d. 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/ES71G2415836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882ade889cf27b12f3eccba97dab83ce4db2ec886f6c26d07db41077fb3df4fd. 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/QZDA52595927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cc2a89584c588c5da26b349195a75ebbb21aeb05651b7c8bac989e4d729e20. 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/QZDA42186769.