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 0x28a74ef48d7f8ed4f8609ef9ccb77e5a192199306a93f663e40c605022deca27. 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/5d93c528-8590-4ade-89cd-c48934582086.json and https://artists.proofprofile.net/proofs/artist/5d93c528-8590-4ade-89cd-c48934582086.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 0xbd0513b7ca9b8ef8383b3f6a194600b0fcb53b74d3c67744738efb24148f1b53. 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/QZFZ52172389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb559376d9fff848f3b3c2111f9eb8b2dff8bdac05e56e7932a0755edb12542. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZRP42196354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1f45eff060c8094ce8a8c6962a67cdd429bc45bf80bf141a4e8e5e56a15bf0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZRP42240568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848173c591cb05d9fdfb4695a27bf0f316721aa1971952dcc1bfde7c4e99f6f4. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTAY2202679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaec7407ec2c220d3803e0d1fa1c92bf2799cd53cf1fa59e0cfda436fedb6847. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHN32390932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61861860a931d755c695d138d5bdd4ccab36560e7f14bb2e8b8837ba48c60537. 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/QZHN42325548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b1edce7c6413362cd4bd95c332e84be2b6bff19ba58539d3825fe9e0f6c831. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZK6F2334838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664a6b3964f5903d850fc27c1a97862081fcbd83137895698db4145a2a11ae3a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2334840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f7a4a20e44b675b89c7f167343544fbdb9eeb53947bb6e584d6d8831dbb7ef. 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/QZPLR2383202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea76255725eea50e05a56c0d8176feeea05f30273150195df7a4d479a91f6175. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAW2397478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52957786ce103ce1d87934c5d575ef417d9dd4ac971cf49f116f177e1ac47ed. 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/QZTAW2397482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba225d384bda3fa39b1b9202677f428580edec41c55ddd0560819af1a9fd72. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZTAW2397483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851b7ff9ffef5baa58c13310d355793e1ed39812608b1d9498472944c4081e78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAW2397489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd805c1ae08c680be512a1d16c4e627093c6238b2d2802c36958a056746d66d99. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ32411074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33e01bcf9ef27e4ff31bc2593116bfd69492876c86f73f5b8feb2d2fde1a98b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZFZ32411075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e091e40be239a41a95ea0fe6534626903a1031d20ba84df14b6331243c6c72e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6N2486491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b56e122b3d474af8d9c3801d4f8a14df7a6d2952bb930c718a0d1e2f1900f8e. 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/QZMEM2436477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba39e5d9e105e31ca97b79228fe4f87edcad11448750749692c77853eb59f9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWS2456145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b7efc88ed710bfe0d3173cc05c2dcdfab170889a7df040a8283ce87294dfad. 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/QZWFM2454365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb9a3ce31bf2f4ed9e8d5bd829e446ed5d90b91d28bd9d3ae6f10a76f0db9d. 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/QZWFM2454366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56036b6420310407724f577754353db68c20984f37f84509d177d21e718b1ff8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFM2454367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f40505d183bf2d962605b83d616b6e41a894e00bcef4ddbff74f679c75a576. 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/QZDA72532510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03e73c2d2b21ddb59a694d7fd3a5683a21ec877c5de3bfef0e27285a88bd0aa. 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/QZDA72532511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb853c65b51e3cb6571730e806a848b6790bc78e02c351b9f4d94e64b23154db7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3FF2561581.