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 0xf8bf1b8910730e0ded6e0b206f5d2bb31a702b78ff2aff6139c3c225a563a207. 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/0ccdd01f-e3f4-4a38-83ef-fa0850d16943.json and https://artists.proofprofile.net/proofs/artist/0ccdd01f-e3f4-4a38-83ef-fa0850d16943.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 0x5e8fb2fcbcd79dc338a67026ee0ad9f444dad9460c30d73aa2a56f2803d1418f. 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/QZW9M2282287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2b4690961465047310135be58b900e9dbe173d5694e640a8a5df56b92e0019. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJW2431601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ba0db63d0ffa8d121c540ea257802b9e2d40461be476d22e7e13adc24c9eaa. 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/QMBZ92254180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cdfc56e175ea1cb3f75318fd2cb98264f52023290196e2ffcfb35e736e8365. 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/QMDA72148003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2516c5f6d206c5d3e18ea3f51300f06d4e8034fe9435ebf24fdd0ab26d1e68. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZW9L2336920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deff8ae34c0ea8c8511c1b51e62fe30a0a4dcac05ea45eaf936951e32a75b59. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZNJV2433071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af9d7931fb0e83a3ed791b882a78df84b004f0c8b84b87c4af8c8fcd92403d0. 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/QZNJX2338609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1459e78ee641dadb57f79839c8a4884bf5839d2105c311208b2fd6af8b30434. 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/QZNJY2548408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ee917f3d40e8ec8d2f724130ca8a6cb365fb461061270d86011d226fcbaa73. 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/QZNJY2517083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67f08ed16a30149560bdb6d9b631e3a768f4e8377869459cd4cfea83eb669b8. 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/QZNJY2504254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1c088febf5dfab9fc1ec1ca325c36bddc564e7b5a304abcdef0116e8c17d8b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJV2550357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41128e49b30776e9e353c0cea0b2502c981528758432ac5318449269ddd7b7d4. 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/QZGLM2515331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4da6d5b801c0d5dfd2029f6ccebc8be26630a96749089e606e85e8cbea5492. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZW9L2495878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc01d8e3fc803094c92c7388945c16c55ebacd7f84534715ad818e1a9e8d8ab1. 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/QZW9K2415126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db30ba81e35898b3322babec9621a437f98bf62950604523f0e9c60ad371d2. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZTPX2489313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4092d95cd80f70ee221a0bac663920a7dbaede93efc9c2263348da1a2e8dea9e. 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/QZTPX2482392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13a3c1bb5857ddcfe844dc2cd51490c369c1783c042df79a69c615ce27340cc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNJV2499911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cde91468a506d8c8389233af48e10a9742a9a4d4f0b49368c14d5def1190788. 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/QZ5AB2458677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ae2e20de6e0f55811fa8f64878cee0a87485d613f481581dab22677a5e9dc4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTPX2301509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ad53d6c6aaad149f6e21e04e4d97cb0b2eabb0e3879366dbf11056f1126fb3. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US7VG2367333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af68b302a23e3e52374bc3618ec0f1ebafb8f7eda3d7c581e2c33747bc01f43. 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/US7VG2367334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bb27885250618fe895edd1824dd43ef3fd3a33f4f422d2ffd304885b996ea4. 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/US7VG2367335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e2ad60bb7199b989be15236c410e9f87b54fd2a4920e735684e187bcd5e3b. 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/US7VG2367336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582b5273159fd17f9eca07bde4c6a83308776a8300bd17609aa9c6ccbcc337a3. 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/QZNMX2231276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651d2ed1e11d059995b3fc69409aae0d0894bd631bcf71ebb41d83ffbfe0077d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTVM2277718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6915df600e343bd5d5b9f006bb2fdf1372202e12ea675a673066433bd972b108. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM6MZ2290164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f3551aa780079eb68f1f1a053f33418062baa60eeddce8e39147f1a5fe1d5b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX2290104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f8ddec9fd0185780c742c1ed6b46fb343e9c273c8a496ef5fc04637f661a5e. 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/QZHN62169211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9b6e2565e21b874c5bbf89a313a9fd0876c059282a0dd4f2438e61a6e67684. 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/QZDA72145442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7941e0bc5b7f5e06cca413b08a22c940677751ef080ab0bec5a2e3afa537c719. 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/QZPLR2060101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4963410383ea913e5efbd668c1407bd0f27e2b8859aa4b9d6a397afcd54f7fd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6J2036432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d78855a82fa6116b348f555d88661f005d5ac02e07fd1f7ff27a594685c6065. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6N2092464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85186cf9d7a670369c968393e74410d978cede5e75fd1c9da3976ad34cd7f85f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ARIXB2403172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccc3d424b585e2c03040ba49127e3b43c0aefa9708c6f0addbe5c95b2f4f476. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARIXB2403263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bfd5a462a47ef735225236f6bab7f5422256cb967c2526b920a3bd294aebf5. 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/ARIXB2403262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822eb198c279e7f32ed0ea43c1d5ede19b19421d9d3447b03d1410d75fb7e7b1. 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/ARIXB2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697f96ad0674ac605fd0f1d9a5ec2636c936975a10ee21af717eb5973a5a42c9. 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/QZNJY2548406.