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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda59bf08f81d5e2750453f34aafc11cd7e22d5fb6699a425c3e54a01a24d4f8d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53bbb51a-b589-4e32-9f25-c96f966cde30.json and https://artists.proofprofile.net/proofs/artist/53bbb51a-b589-4e32-9f25-c96f966cde30.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb749e1b72a90376a7b2263c51c4c4b7d83b7043b285c6f2ae7f3267cbb916c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYZ1949611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b5030ef7e4a7b766974d79acd403034e8c906c9e44d5726317a6af7b3191f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:57Z), 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/QZHN51936572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca40b1e3ee4a120b3796ce7ed31be3d07f410f26de47a8eb63242b3d63cccf6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYZ2067992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aadd82a9e306c268dfc4e3c12d2c6687812d62034a155188d5955a0dbadae64. 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/QZFZ62095905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8ed142f6b3e63780355ce737afb95c0add8258d2b1d8f669fe6ceb891828ca. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN32054989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38df498fe847c49bc6c70e66a7121a588fc2c9365621ebc93655e40ec28d2a79. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6P2077778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf660e05fe0b8662255e1f3afffd993ee3eceb6c069979df7c16bfe4c027db7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:21:04Z), 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/QZK6F2045117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fb2a810f93790127b74770899df056ce58d09cc297ead20f7d94ba73df1368. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNWR2011288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70108ea252ac3d18426150e152424f84478439480730c619b1fd9faadfc4466b. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:02:14Z), 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/QZFZ72157794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97a2d0a6cbb6f24f51afb0df885759d9b57de4c1ff7f0ac19963b9e6faab27e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6Q2119899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b6a6baeecca9e92908d27ef112e50e3d9afc018edbe3dccfaba6570b7870ef. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6G2178662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a95bdbfc9ae26bb436ea40a334a5a4bbf3813c3718486d5203bf84eabc166. 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/NLG662200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56de0fa66dd7c46de63608b8f7bc56227e4a26842bebff7c4c2701200c76313. 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/NL0472200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7defaf44f4033e9db75ece45a8cc38bd47526ad923cf31529d138f9dc4814cf7. 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/QM6P42312089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ab868cef228431f67e7e411343f7696d103ca24d629376ea11d7e2d19d6e1b. 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/QM6N22481597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8211a37392f3db30609434a8274a33f3a6f93b7f804c4762ea45174f171bd9cc. 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/QM6MZ2450243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aa16d3b98aa6d898332603f851872f32c4649c61b9dbf2ae2aefef5525278c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6N22423918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498e522602615ff1a535c269b90f7dbb1bf3aef98c34bfb4acd26f5015b8a2c. 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/QM6N22481611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7f565d3a6e1d852e3c005fe4e154be1a5d293c5eb0ed03360f0f5753a71386. 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/QM6N22473282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c0340610f4aaa45017bbae64f5198250c68a4113d9b3873ac62f9721bde60f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2453211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea360bdd28728d840298408084c5235a502100fa0001df764f9e1b443b6df334. 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/QM6N22473285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c68bc774674372cd2a30fe762095a3a4be6cef0bba886a0c629951d283e45. 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/QM6N22473281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e2d76e63df17e72aed880a01742ba7f4ae8652e4c380ba52303766ff508267. 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/QM6N22473286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29fb1e84707ab3a930cc4c255b1697a9d830b04028aeccfd89e886f0f63d746. 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/QM6N22473287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c97fcdce26c007358e66ea0dd988679ce79f3b5049223e4a40b9e99c20bb8d. 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/QM6N22452404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542724c35ec5b5d2654377cf4806bd66cc2ff67a2a09cf0ce9ce70d5814ad295. 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/QM6N22481613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7493c2d1a6343e382dd8fd40688a2957177d4a0c42e3882fba914a814c4e620d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6MZ2416497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe100ee14af0823f53e20fe5b91c04debed7c9cd5d65fd31958142824c3440. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2415163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18379469726448837de4f2521b68944619880406e8f33d13ed7137c159aee57. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6N22473288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d628450aba4e2aa9ed8e841bee91cc67c14b6e6fe13a1d7fbbaec661b29844e. 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/NLX1N2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515c41687144050b54057a7e38894bd0dea1de15ee9a44a25220e28079d0d8c. 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/NLG662300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18467f0ead39db9593a4e9a77979a05b86cf10053aec76a4ad2e85b17f0fb6fb. 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/NLX1N2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ea50ff9dab169c7e64378f2f90e0f8102fe5f676a4955f5bac5898a878d3ea. 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/NL3GQ2100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198e5a6a1d249b9565812e16032ed49e09759f7ee34d09f35759d5739dd52b2. 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/QZTAY2313078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f1ec57e88674f349b8e6fa40c270947c170f6491424771d3b3e9256389f070. 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/NLG662300051.