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 0xff46f5eef70b9d59852e997b7b7d7667b07c1f8e6f7d19441fc30c2ab9071820. 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/6ff4eb4d-0e7c-48ca-b80f-400b8789b43a.json and https://artists.proofprofile.net/proofs/artist/6ff4eb4d-0e7c-48ca-b80f-400b8789b43a.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 0x682e2ba41f9a415a91c5dd9114714815c10533403f692a83d43bc6e9f4d2bfaf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJY2387282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8dd9e59a6691c5413d12833ccc3477d07c744cf0bf40cfab797b4ab2252e49. 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/QMFME2128558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36469dbee76fb4afd329932d4860ef2da5704b530610f2140533b1704d3e7490. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME2129168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb125529cb63126a22ee66c542036780f9e288597c688eb96e8205a2ce8bba59c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2134553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1076ccdb45b431138ff3e8442fbb35eb718b9a67c14800b463f74a47c108ad42. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2143124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ca15e726358946e6b516868adf30360c90d5ad0daf09cc76b2b6cdfbfdd7fa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N21854060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24818b19cf7877732604b7c08bead5bf7a9f1ab844ce63cd803bec27b593a2d. 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/QMBZ92039528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0003e8da0bd7d99cfa250b547f3ad6e9ac32add4391a34d4c069eed58f94ef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2129407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1806948d659cc36cff33c3f7e3b11e9233d000b5a9ab0edc9cd43463d58e0ede. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG2393128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc40ec8de1450341806d930b3cf89cb6237342c1abf6f377b984fe12b8b9691. 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/QMFME2131659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11904cc37e576395d28c45a446263b376f8de9f64f1b845893b14e2fd690e2bd. 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/QM6N22013128.
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 0xd88d5d35b79882808671bc2ee87e3ad40567841862edbc6ab2cef6ae647418f0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMFME2129842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405a24cb6ed6c8e17e1719f0f1124182ced93a6b28f2fbf1e1c4c4d6e56a7494. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFME2018279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbff44108c79371819a8e7c0ee4227b1b2933d001aaed6cc254c0d9bd099514d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QMFME2134586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f6085ea350ff122dbbc232ed3de284f3ca8a16e7aeda80cbdb62a25f0a58ac. 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/QMFME2131658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714cf9934e0a4ea61bbe701bce8f95f063e8f9fa970818bb725cc7cd38869dd. 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/QM7281713944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3187ffc9e9db87e2f173090f55b6431f53859f4652fbb5296b074d2eac89c8. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TCADW1843680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1a49982e5ff1f6f102795bd6c54ad62e324ca4927197fefd16142757c5b833. 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/QZNJZ2473757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fab7e8e3eb8f11c96113cc87d30225f29d8ec280b53c3e42268407e6871ccd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLM2415219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04eaf99935a2ceaf6a85a97951660bb9be5ccb85fd871ac751127a53dd4fd6f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92303954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d910b7468219da668416cf3e02405385fb60e033072ed8c5a54019344e99214. 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/US7VG2359436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582bdc0bdfbabfa2e2f0d475e1052827654ece274bda3c99b5bee60a4bdf139d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72125093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b784d5206cf533f9c02e0efa6a2d3278acfc90cd9bd41864152a90c840211. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA62177933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacae22916efbfe0fb864eddf5f95683782ebf238d592f815605cd6dc0a586c43. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62150511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5d3c7c68a062def35c9e81bfb934d3bd06e17a8165d7e34da5d2a3defe8c9d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA62150497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345ba33ee06f914a18c7b8d8dba8bf2e9a663a5545bbd8b7ae14378d610c5f7e. 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/QMFME2188186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134ee7253fe093311ee3de766c99655d7d59a3606c1ce46ddad28c6dd4734aa9. 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/QMFME2129400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35cb8d32fe6c0f118aa9c107d1bf4b5590d71326ff6584c25719acac8d765aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMFME2132264.
Versos Callejeros (Tiradera Pal Batallon, Lapiz y Fother)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1088f474704b2ad3795b126ae963f7be739111c694ced469e9c07d6453eff7b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2134504.