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 0x81480619820c22fd987952f8ed888e01ce4750bebe7afc390b06aa7c87408992. 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/4c44152a-dda5-476c-ad00-0a39c60ba24f.json and https://artists.proofprofile.net/proofs/artist/4c44152a-dda5-476c-ad00-0a39c60ba24f.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 0x1cb0ba7fa1aeab8446fe27cbd16e10f78107be11e63e84030fc11c602e6438a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z1783568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6ebbecdc16209491aee504f12d3c3df14846a4d8ecc085bc52eaba0ec57613. 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/US83Z1811160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be3bc1934d475ff2af09bad8320b0a0d03d97b94ffeca7c1a93b325fbff5902. 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/US83Z1811162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251d736827d5e90b634731157f80cfc5528e681d2935e705f2306e3a133a47fb. 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/US83Z1811163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7376ea40bef1ecf119bde1b025b3a3661cbea49230fe59d02d70fad16f995822. 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/US83Z1811164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4025479dfb806df3265e708409335606e2d78ecd877a46c5d56776997fbbd1b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/US83Z1813362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4496d255ca6d87fae52ce7c3f7ce27ea76dd456afa1a1229bcaa9f630d162cda. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEPQ61900748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4be9df7e6075cc4c9f9ca1d796848899b63b918b7fed867724e069ca3a0f8d8. 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/DEPQ61900749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a8c71d04495e362657655659e95e8709e739bcac088bd3af976ad06ca8cd46. 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/DEPQ61900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79bb10813d3d0c9d306511e0fe9719ff8cedb13e9ba3d410fe91cf47d1cf281. 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/DEY471818412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0341c002f0a26488ee04f8b0e069f29175345dec58ed99f37f47c00db89a2bab. 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/DKZVA1962278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d6f3ba5e92f8e099ae5d15c8b516b06bc3da19423817b8ab094f014309a3c7. 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/DKZVA1962279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa760d449e51dc71dff9f2e298e467d0448e2e0a60faacb78dae5d7f626df7c15. 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/DKZVA1962281.
Una Luna Para Dos - Coss & Iorie Crying for Shibuya Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a2d571ca9e0f33ecd17d2ed5d394bccc212307569e43320cd0e3bf890efb73. 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/DKZVA1962284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db2622eff6087f55ea87ec6d6ce527dbb1f572f48d7c007d0081a86f8c20383. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/UKEX31900813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a583dde1e8c3657fb21b18809c83080d72780f0aa5b2c96bc446f68abb1a5b. 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/UKEX31919715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7c93f6c60e0592f0845ef869d0ade8317ba5b4c5903db3d6cb6265c443b65f. 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/UKEX32002829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335abc9307dc06b490891272a7e0503a5807c367924ecfd779887b1bcbd52394. 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/UKEX32002831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb77cb314a4663b74e39ad21263ba9ada0d554aeed79f976dd89e35ebd57014d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBKQU2081888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faad711e739fd2004eabbd1ba3c30851fb9a916c31b957cf584b68d2ac526cb. 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/GBKQU2083743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba897dfc832d5f4ec91c1b01f6ea385233c9120d7194cd860e9b44c6c129a50. 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/US83Z2347113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e321bf37d17b8411b0ce582dc75008c266be2afe7b2cc365c6d6e0e2144af6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/US83Z2462885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfe0fe3ea059495729dcd4d712f13eaa30b4b0b3016714a78e36466a46805e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:40Z), 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/US83Z2462703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d78a6d2a1f2f6e02fd9a4418b90d99bf500f75706df5e5b7cb9c5b37cd573c. 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/US83Z2489328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b21b7149d1a16d9eb1405870b804d4d21c52d0861442875443dc4eba518e24. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US83Z2411751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e74fa36d18a93e97d3ff4265116f863c5aa22ca75b4d8181ce923285110e41f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US83Z2417679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d182f16e7fdd1546c93e42f13c38fdf29254b60e7d76448f0857b402b58349. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US83Z2416565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fcc4f3bd5d9af9e7ef517a64460d5bd6594d0d04fd2109d1596932e2215260. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKEX32456843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feeeb8900deab41dd78336daaf08e8dafc0cb23cdda89b2ffb2c34e5dba9561. 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/US83Z2427044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe998adaafb5ab391c22cbe4e21b785d1bb131a50a06239d6f393c1d08020f06. 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/US83Z2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d80e97275eda9aae5f1edc7e7029c67fa1f33b95840afc73a4791bfa27a5a68. 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/US83Z2501492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffd95f9d7b3aebda4d0bc0763ef3e064a119c2bac3bf6d4c2d9772fd70632a2. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/UKEX32502130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b7b0d882471b1a12f1f3fecfb01ee63f52726426d557989d9c69265e5d3800. 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/US83Z2514814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7846136fd8eda9c0f28ffdd40874a356bb4f10c7f7e34047a3d8b6bb7e41caed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/US83Z2514817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71788abeb3c9ecbfad803d7ee045e4e413f3cac278411555049654f387ea58bb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US83Z2516351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc58c20b902e9e29f37fa1be60e54863bb0e01ff0b998b342517f3e25bfdc4c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US83Z2519770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece85a7091db9bc7a24acfe62cf04c11d5be9ccdba8d43283f17bdd768a34c86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z2526267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4e0c682e42ba7f087e7936cb7bdb47e56d8a9ec5a38af79f2eee545a9bfce4. 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/US83Z2543409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf0453af9a5193ca82ff85b540fef3fcd2d90865a65c6f4c387777c4b1cf5b0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z2543242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe1fb45f70d93b41f46f680b5b4dceaab612211515e9ce9d2d670ee5b55a22. 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/AEA2Z2584747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a2b1d7080be019c0a6718c320e98da91c7f9e593e2cb64400ff0ea3f7bb588. 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/US83Z1791680.