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 0x5b0b9747565d873e56f5c02a698f82c69d528f8cd9d93f3dacf04a2b5e1fd513. 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/0be36588-fc67-4f42-92ba-61e9f3f137a0.json and https://artists.proofprofile.net/proofs/artist/0be36588-fc67-4f42-92ba-61e9f3f137a0.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 0xf0507623b51548761ad1ae0dc5d61738af138252f479d4d1a90f09822f094fa5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBZVM2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c0174582b01abd1402d3b9c6906428151c04296935ab4da6d6091e49db895. 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/DEBY41200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139057a308b8278a3ad8c78f11907f7a6b1873e293f564cdbc096776a8559dfa. 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/DEBY41200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32376a149db5dafdc2009c999bbdf577ae1f2436c91fb6416832b469f2551c08. 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/DEBY41200615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe172fb467f0778a9c0a2b2edde033478454d3d34393c2a5b922d0bf0e2631605. 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/DEBY41200616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cf29ba28381e4509ecdd5ae76501d171fefc7fb3bca5f418cdce4d90a34400. 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/DEBY41200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1875f2485bb35f244836297d5ee26cad303f7ec4d8be33da112a34c328247819. 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/DEBY41200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a72673dfc98bb95ed514c2402c43523196043e66ac5d1fc4d2f447700805ac. 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/DEBY41200618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd140db3095143048e3e9d08412ad800af1fb89ee5a5774dee5f9b1e41e3d9. 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/DEBY41200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491eb4dfe892e83aa7edc35a441f6070dcc666459401d58535b9efefb255e4af. 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/DEBY41200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab7f17775b265bf94ca6558db97f6ae4c7155679f12ebe6885060f2cbaeef6e. 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/DEBY41200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2891ff7ebf02955592abfbe4aa6bb2ec0a361039b60903fde40c8e49945b7. 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/DEBY41200622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b9647a9e7da8df750194ba05a098f0ad4179e14c85a0a770df692dbd5703e. 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/DEBY41200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3771dc264a705cf4282d37f4e57b3ea67abe183ca4469d95445ed4080ae194. 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/DEBY41200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa75d81641b46e0da99fb61e8a60c10a1b37f4decd0defb2d7095bdd4acdc13. 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/DEBY41200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787941467d1af76e472ac092d10d0801feaa30c8e77834f5b1c1da326ae6e7e6. 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/DEBY41200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7a83ba8d70d9889e9428424725d7916b3cd27e382aaa3d1e2dce1235b93675. 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/DEBY41200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a1f1c3261eafc71efbd8e7ba394ae24be1f1fc6551f06c3cdf65dea3325cc5. 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/DEBY41200509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d9a47cf4073c8e53667ca9834893c6b5ab66cb4a77ff40aa4b7ca0de9552f4. 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/DEBY41200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c8cc9f9210edd25e5a95c37d4929fa166c12d4038f487f4c0f2f7fae11cc4. 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/DEBY41200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787941467d1af76e472ac092d10d0801feaa30c8e77834f5b1c1da326ae6e7e6. 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/DEBY41200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd3f1ad81d5ef0799d3b9cd2ac80aa6e027c22b56ff541a5709331416bd9f8. 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/DEG932004344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe223fcf655a14811eda7a4d2ced9c0e3cc7268841f7a76a412502757a206f4f2. 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/DEBY41200514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d9a47cf4073c8e53667ca9834893c6b5ab66cb4a77ff40aa4b7ca0de9552f4. 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/DEBY41200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88585f93d3e10189388b107d4c84dcdbbfc71f0949dd020ef45f20a978cb8adf. 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/DEBY41200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cd30e6b28d2c3082515837b6bb15460282fe5ea25ab0a9a47325beceee8a8d. 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/DEBY41200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c36fa661299fdd4c7f437027def80c44240295d741278d2c13cb6a92a382a4. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEBY41200513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9f6d37a58c525992e72382bbc979080b9e7c22055ac2bea252acdbf627b415. 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/DEBY41200559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f13e875547370e9b073fd59743d4d769f1000e090f13d0a11d99f4c18729a4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEBY41200527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf6efcc40d4455b9d0aaee6e8179a8f68677c67ecf6545e252c8115a9a1191f. 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/UKN6K2001461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99984ec55811cdf7ed23e3deb55bab66a5a06c69e60e9a3b18c6a2accc7c373a. 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/UKN6K2001462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04ed811d10d5974fd6e7377e604218cbf081b9c169a25539c526f9dccf5bd0a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UKN6K2001463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7a1feb382082a9c1a90d5aa84cf75a5d9a4970817e9150a63dd2ce3df6fac3. 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/UKN6K2001464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74783eaeac7c8749aec705575c8a90c44e1fe526322194be6472d74c9c03e87. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/UKN6K2001465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a72a63ebb504cf9556c72e3a737f2fdb2ac89788b615b4c60aa04a93501b3f. 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/UKN6K2001466.