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 0xa07840ec49f3537eedff206b239e1e298797e2703e9ece09d42b93e36ab1b139. 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/adcef70d-ccb6-486d-9c3e-6cbe5aafc157.json and https://artists.proofprofile.net/proofs/artist/adcef70d-ccb6-486d-9c3e-6cbe5aafc157.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 0xe474d5d1b776de6b12763daf4eaef3876dbc0c990edf1f161db5c6b8b7aa81c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYZ1994857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890f18035ecd6b52fe98d94480e29f1e48233f6947c0644672093d6a56f1f241. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYZ1994859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439638be8511ed0813fdf7ea947ef18afb37bfdbd028d97b0ae1b731d4158394. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYZ1994860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0f8e80e4b17b1b65784e8cfa5014f1b89b15f29354084cdbfdefa03579f799. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFYZ1994861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3602b3e3ca4f70a6bb8c5f649660aebcbe9c22b1d62ea21bdfb266c9c2768a83. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZFZ21910552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14f4c77474132027322f62b75255f4c49701ef2e83eee41dde7d10cbd0af47. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ21910554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e5ba8432f9f223cb529099f79d6c7fde19a61f18aed23bbbbc7796cd7dba35. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZFZ21910557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e318aaed4bb32385ff562bcc7d6318f98a6b7b2a4ff655f021e2b1727c98f8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ21910558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ef0f6d7eb089c67be591de73c6c6f208759cd17793e4b4fb62278a004a4b95. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ21910560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf807b98c868aa26875dacae8774d05bf32b54ed83833e143be58b32bc385e02c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:02:20Z), 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/QZFZ31901016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57edee1d1d1dc5bf164123105e1ee3558e8a4af9fb186f6707f8c0cac290c586. 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/QZFZ31901017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76491968b3584fbb01298cda8c8f3db5aae244b72ab2ba712ea9793a165b7a22. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ31901019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd64cc72bcb8445a1a68fd6834da95a8d48fb87ac2ef8968445b527e8f21766e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ31901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af83a0fdf62821fb381ec8f6daadfa61d285f1697748f1c80de860cf8cf6a1. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZFZ31901021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5904954f52a854ca6879f2193b7732e3a630ba5af7789849c683940d5a91906. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZFZ31901022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f6479a6c0386d4ee810c107d9226314115e425efe34b309bb2e58ab2faab9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ31904477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8393c30dbf3e50ec69cff7be0bdc701c6193d7a20de89da66dcbeec3d715671. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:01Z), 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/QZFZ31904478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f80c881c14ab2659ec8fcabb714edea6ad0794a55dfcfb9d1d147b928142e8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ31904480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cea25fc196d9874906f8d63517277a0ec655511d9eb0b3c0433f864cef1b56. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ31904481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecaaebdf8208e7b6e0c40fbe54ffe10b0458d9a0821571caa5d7935f8208ce0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ31904482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194f1bd375b67a4ff5d7dce5ff606dd530985bfb6f86aeb3a893ae0971170122. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZFZ31904484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8223b5b6698179fbe3352958ba5441f8ff64af29b096762a3ed856241a503e6e. 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/QZFZ42023163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3595e2f832b51ba1d19a5413ea47f19a5dc6e5dfb36c4428115bc1f6b6b1366d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ42023165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba301f2e3785a0439d54a4fc31f47a1ab67379a2d4346d722c385c9001e00d3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:47Z), 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/QZFZ42023166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd1fb6542a492e179d3e107e18d67d10c9d05b3840265fd445eb88b4521c69c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFZ42023167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6c0d12c364701beba3887db04d64de9aea4a8f4ab16bd00b7d2dcd511fb7c9. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZFZ42023168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd31933030e318a0e16523ded14a0c102d80c1ecf9f501438a1391a69656f2b. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZFZ42023170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa389759aa4a35735e4fec78724fc16b41c7b68b136baa0eb9177857438760db9. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ42023171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c30283dc9b4de7d0cf3e68defdfac249996e47a050536ba081b9fd63cfa4d81. 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/QZFZ42023172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23efda2e52432ca9a20c49a2b76e68e2bea4f46c96b0fc83b1cf22f3ae0db089. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:03:03Z), 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/QZFZ42024972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07be80ccc2604c2f7783bc2676c1527fb9aed4fce06625844bbb1190cb15f478. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZFZ42024974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dc52383f750b402f7ffdf4ed96a204d639ede64c0026caa06f048b56b469ec. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ42024975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2110b12644cd8f1044dca37800d0ba9681cfea9e9f99ac476d2f615f9ca212. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:01:09Z), 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/QZFZ42024976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd664fa992b793a3ae2d03b18b9d35ed8950a062c9aaf5bc038fcb8ab44456ad. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ42024978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae33298e134b0490edc5f24a9b8c5dbc37aedf34981964f5234f77be6119c2bb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:33Z), 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/QZFZ42024980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f739a35547f6ae4c9b9fcee10441c9d34c5934f7c2f6455b9b3abe77214c55. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ42028290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f1169ce9dd2bad4414e2571df8d4a844c34b314157d8cbbfee298b7366a944. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZFZ42028291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92b395b857dbce6604d1ea4aeeafffe105de24e8a1b13ea1091ba76321bb61d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ42028292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf304f3ab3cd0a948c6c30385db0965e171dbff9cf0586f92d8045b04c6461ae. 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/QZFZ42028293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee286fc3dbb1b8eeb8fa58452545d47d9a6f79b061f032edae1ba19e57ea296. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ42028296.