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 0x056672a156b4fe0d9f5dac36b20e5a31d764b238dcd35beeaaa5edd4f794b589. 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/2b42ab4f-68b1-4d86-b256-3ead738064d5.json and https://artists.proofprofile.net/proofs/artist/2b42ab4f-68b1-4d86-b256-3ead738064d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x00df15e60bca7e1c61b300728bb039ef6149f53e9721ec8290e497343ba04e49. 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/NL1TL1900734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fd9d6da43290cafc25f37ae6418ca79f3d5cf5c443ebff69c08ab5e30ad91b. 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/NL1TL1900735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8610d06ccaa487ffb3a63bbfadaa651ce5bf9dc22cf14f35658784f5b94b1c7a. 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/NL1TL1900737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db4875edbbfc4d2b4f2e37a8a4fba9593516383c8989d56a0760940f664523b. 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/NL1TL1900738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16415c942a859f7dbba1d5d6611e867a2e8c71299720f7208da52121967966. 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/NL1TL1900739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635b8db672641690a073723337db4f54ba80e7f505f90ee749277b448691033c. 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/NL1TL1900740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bab1efd6c6c2724c230b9e4f741b50e66f6e4caa94c0c2aafcba2712c01e646. 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/NL1TL1900741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8940c4ae9bba09ca95737afe6052b9a1d239c27e8afec492548883f6a8ad017c. 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/NL1TL1900742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e281e4b38849aaf7cd2102faf9a7d2b802a206ae8a6cbc966ddea6b11a5df8f. 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/NL1TL1900743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1c98c6103320e29f4c105af5b08da716db2050968ba88deaad585e95956c74. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1TL1900744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cda8d33d2a12c298ef632ef090088d57b02683b574db2fb5e7e580f3a79603a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1TL1900746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c1fa967ddf2f314a8bb55e1a57001eebe6f613f921137a6a1d8674aacbaf3. 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/NL1TL1900747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725797d41a70518c93cf2bb1723218669a5c6d368a472cbbb1433408330a3fd. 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/NL1TL1900748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b6cc0e36faf038f6d74ab28707d118ce3bad616b243254ce4c331f3790a990. 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/NL1TL1900749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039e6c56f72d6705ad6c34341baf6036e6b1b4185cd77042ea47fafbc2ac6396. 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/NL1TL1900750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c118a3fb38971a2993c1afc481e7b75323ebe36f8b113e0e6bb06ab6addfd91. 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/NL1TL1900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe1e45e0172ad3c33896ee09819a4fdc9e16068f75f5f46b13c6b59672dcec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1TL1900753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde63e4d15d8c3661d2d2b660f1a47b46e9395e1a5c0a462c8b0675799da175d9. 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/NL1TL1900754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f01a139fdf14cc94308a6018d1ceca9819574827a8c4555f123425755cdb48. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NL1TL1900755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8cde4dbce872925e5c77601a6768529fe63a7a409c1026f8df921fe10bd893. 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/NL1TL1900756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350c119b55ceb8030f8b58451ae3f826ba7eb60f9c9479640f86f6ddeae50d10. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL1TL1900757.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f6fb921a45ea5c62c863230b05fef3b7d63cae48f2dad5f2dc96fb8107a217. 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/NL1TL1900710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a63a4287249d6ebfaeb61564e36657f76ac0173e48e71a37a3932e668864c. 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/NL1TL1900711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a7397bab8dffcaf9550f93bdd57b086b7d9035a7773f5a001f31804637b941. 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/NL1TL1900712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b8da8e161a45b3aad1c0c653f937754513ee074e13dca95a9697a27228acb. 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/NL1TL1900713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c70e386029c8b6126733bb0d88385534e77bfd57f16c376e945a2f98117b18. 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/NL1TL1900715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae39c8892c55ad4ac9136c54e204b3ef3aa4b9bdd10c313d085ba48d1fd92a72. 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/NL1TL1900716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1d021a9b60e18fbb95f8586ef76136c3a6eba2cbfa6b9671e66abeffa0ad7c. 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/NL1TL1900717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec15e5735ad444fe5b5cf6f1e7c198ce2636e6fa944ca096075758d0fc20e93. 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/NL1TL1900718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e560148ef3c60d3b3a1d7321a08ae51f59070f04a3ef95204bde325d4e634a. 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/NL1TL1900719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca44cd4722076641f87df339f9a72dd6f2bd8c305b69ab11f547b226c190141f. 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/NL1TL1900721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715353ebb74460bfdfb53b8583cbc2c9192868c74fd28f470b4e3b4194ac8f60. 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/NL1TL1900723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fee156e7b7bc9391fe55afdbf5fc17aad2a0554d2693fb3f3795a6d955fb7bd. 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/NL1TL1900726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98315b0a324a3621bf0f3cd7af10cf0c54657fe11104aeedf9a08963b89369c2. 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/NL1TL1900727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b94fc65a34eb608f4c41431a72fd7a03e4bbb531709ca606f02f15de4f76c1. 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/NL1TL1900728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c52740b014299ac4ea9ee3bf96a5b3fe94cb1e09359873cd55d2a8261e60e6. 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/NL1TL1900729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83f960a114ba32e05acb0233cf9c9a8385dddaa948de204e8d11dc8733c5a81. 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/NL1TL1900730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7817dee23f22affcec23dec774c9af29ff8cc2268a7cdc7a5a36a4eed674ae3. 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/NL1TL1900731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a57baa20f0b8a3de1f3c6b4f3d1006dbc21a14a659dbf889cb024004af5f9e3. 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/NL1TL1900732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c583327c1debe0cae3c897e0818cf1b3f451047bf931f97866f9ab88e907a0. 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/NL1TL1900733.