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 0x8a255d7f0b1df3fffb5932f7b0084bd22344e2ab4928d7af28f1ed679cd080bc. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c817e49a-832c-4105-886c-bbd5bf8e8963.json and https://artists.proofprofile.net/proofs/artist/c817e49a-832c-4105-886c-bbd5bf8e8963.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 0x66a9dca55104a1c217ab6cbdd1ee58b4318e13e560c66e91f0983cc44db1548b. 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/FR9W12351583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c743133d95b7c0f4572ffed7729b39dc3cd9a3c9e35886a4252efa3eedfab28. 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/FR9W12351584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6196faecdc171f9161df4c6798777bf7b2f6ac0dbf1e72f414d7051b0024d4ca. 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/FR9W12351585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779b99420f22559a95e3d6c220a9d45c509f08011d87e71d58b4c7184bc97947. 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/FR9W12351587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0dad3987c972c38aa8c42f0dd55e525378c60ef3b373b33911125f0870e3e5. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/FR9W12351586.
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 0x8bcb3f54e558eb2f099779157e9e39c2d4025c7924f99b62b56349983ed1ca1e. 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/QZNWU2389918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cac04bc5057e79a15d457e4146d44e741d8df758c5c9cfef5ab3a0198fbf80c. 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/QZNWU2389923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb2b9133b55803de52b3176e959861b3c8282bc188aa1b984221f4b150d6b03. 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/QZNWU2389916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfdde7488769f149d7014a2f883387a271ebefe121edc5c1b6ccb298421f7eb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHN82372207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c77d1d68a4d919a7a897e4fcbe7a341ef8cda535b9149f289795da480f03b3. 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/QZHN82372209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a1115f2b386fa1bec13b710853e69ce9abe51a061eae9705bd3cdd4743a5ef. 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/QZHN82372210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f9941e8358954b9bb38c504e46aaac08e82c19de7598cf1ec0c923b15a06b6. 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/QZHN82372211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4694581edf4fe7e7bb0839519f3484950a7c30964ed08161834ce56d5e3fd462. 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/QZHN82372214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd347974a4847f140a88124e1779efccdf431b23ce306f0fd7db379013f39bfc1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:42:56Z), 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/QZHN82372208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe376e61d4e295ecf1c1f1846a5a668c3e5efd97c0b84ff637d94fc5e50e4ba21. 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/QZHN82372212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d13eb43a2b3fd7242c84ac6f20a233b97eefed7995129236744ef9c1db87d17. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHN82372213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12d420a73838f8420d341a3cdbde12682a554a6b7f476b29b16ac4c01fbf284. 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/QZNWS2499026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b4650671f0fb6a4e2a7be0b3de92fe7fdcfd97cf448ad2225c8bef8ae1e138. 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/QZWFL2313812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e44d71d2614658a0f3587de8060a8b68e7aad982c7f7ae3a9624224d65139. 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/QZWFJ2317825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e147e34984d6734a5816b15690c1a0f7ed440b2127e700786a2da015f934a2. 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/QZTAY2333187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00762a8a03c516d3c2c81c39a8d11d4278a69ade67f024f9f711a17ac6cd9126. 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/QZK6M2390142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb95f134332f963cb78bb5bade1c3747378aef8883026af680be25647f3de7. 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/QZK6M2390143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a8900e4f339aae8509d955a62c16ed6ce4f2330807801130067f48a3bffc4. 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/QZHN42499008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a658a9bd8c192855f64108924d27760a21b057239aabde0298a349d87c1df. 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/QZHN42499009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b7b100ae6de784af56ff1b816d8411c9baf3276a61e5ea45d5c93496ea469d. 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/QZHN42499011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4979a2fbf40a805d0959d7d8ca642fb20a4ed9e8f54f86213d4585b991b6ded7. 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/QZHN42499012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20401ab648d748704e990ea12533a2ab0fec157dc48f0fc621d0c1e713a21093. 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/QZHN42499013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96cb4b31f01e23ac987223e6b22fa0b0329dfcd0da3840a71014f29ebb2ec64. 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/QZHN42499014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb711693d99c88e45ff7299bb78293a5d0c53071c76ffc5c163c022c0f6c2977. 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/QZHN42499015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2904472d06283472d3fbb2a12169932e80cb05a3e9040c6ffe103c33cc6fb62. 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/QZHN42499016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282f08b56a916e4e9927f9d2156b867cf18d36ff33f886ec2355ea2fe4140f5e. 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/QZHN42499017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeed04b0ecdf14438522be4c6e75f01f2d59570508ca5169f1dbdf5ac3f1ddde. 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/QZHN42499018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4666ff927a6845ce2ad83f37da2ff73f9f841b0e6cead0bed473872b5e03f3d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZHN42499019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace4d23906532a93e7805627f6be1ff761bfb88ca53f88cc77090e430f7884a0. 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/QZWFK2375658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57c5a39a9bb46d1d1acf3ae140e3a29059895a87f7409142580bf83352b0819. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZWFK2375659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f8081c9898439b13a9bad736b86a76b732c3ebd780cfc775912e499e637d47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:02:46Z), 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/QZWFK2375660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3d4abb35aaf4b84e786b6ad534dea12028f2bac83e43eab1c7d2efc2c53f03. 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/QZWFK2375661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26949c98b7322bc00fc814aa824eb68305ffc4d7c04e10d879e72cbd8d1a553f. 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/QZWFK2375662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2294df34c312e9e3eedaf55cacbf3f8f95bd0fae0e195486193b09300e52e039. 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/QZMEP2425400.