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 0x6805f482e250f0b10407cb67c1c87b6d9c8d3929e1077ed6bd99596c0ce93dab. 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/f4e51b26-8605-4f65-b7be-6eaf72106e48.json and https://artists.proofprofile.net/proofs/artist/f4e51b26-8605-4f65-b7be-6eaf72106e48.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 0x3c272725a1c9b37692e28b0eef63fb471df88302e6bb53e00f0f1b2236499d92. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NLD681802584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9851e7f6635d22e7f6fb198b6e591ec693ad705c2d5dfafe87a3fc2a22fb9ca. 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/NLD681900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb82d3cd7ab69c331afb094427a27079d50194cc8ffaa88644c1068998c0986. 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/NLUW22001088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bff4b83d4fa4a7210c686b31b123b5d779aad365c91c9f0593f00b7f1640a90. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/NLUW22001155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0640f06ad03826bfb33650154fb3ac3615b91b0db6ab46acc5a60fa4677012. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/NLUW22101285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d57cc9087bc7efd775523f8ce2aea79d3f395a64bbd551eba5bbc355bc16dd. 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/NLUW22101370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feac3adb38c77200a75fa91a62d16392f5709416993e56e165acd7c1e3438aa. 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/NLUW22101371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7176be7dfbfc5ee68a305bd206e299b915a2329f8aeb808892f357bc0841e21. 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/NLF712202377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2282a8fb11b0c77add75f5eab44fc3f94d0dc102040b6d7a16081eebbe3d66. 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/NL8MF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549444eda210e37e56b34b08eb88d63366a84a6af68a5670640ee4d9392ff732. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL8MF2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92a57fb85d873b65c1a361f4d580438ed7043cfdcdbc6174ba535bdfa22da3. 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/GBKQU2401157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738681e7784c21fdac206a0f9cff6c9f5a14103880c61625c92dcf36c51f8280. 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/GBKQU2415638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e948358b000c730a3f35a137e568f46963d5eefdcb1c6d65348352ed7ab9917. 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/GBLV62411456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c6c59dfd41f07b37521716aaddccec146e9ddf2ca377e7e1e099216d7b96c2. 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/GBKQU2527658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7390694527b82f39cc92e0b4f1d5bcc78efa343f19cd26170fd2ef0b31a8963. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/GBKQU2544794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30b43f30223b6f220cdddf77dd65fb03543dc7716ee1a46b14e8073132d7055. 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/NLUW22201545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ccc8c1797bb2ca66ee76f292c338aac90a1709fe83ea2701109e10e710e36. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLUW22201546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e81e654ca7964315324ce3e58a4d0e576deb92f64eeaaf34cfce637aab8c4. 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/NLUW22001056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e81e654ca7964315324ce3e58a4d0e576deb92f64eeaaf34cfce637aab8c4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLUW22001056.
In Search of Sunrise 18 (mixed by Markus Schulz, Matt Fax & Dennis Sheperd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f792e71caeae6b39dd12b1b45c539b302188a6a6656734970e96f48c92aa8a. 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/NLD682202447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f1baab6a7d24dd8563c85091294129827ff1eeb6450dc66946aa7ab4c1e86. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLUW22001086.