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 0x3c74033bcf9d5abf33484c701ad06bcc762305ae556a19576d7e957e0339bb98. 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/6f1fe635-74ca-4966-96f1-9e02305af497.json and https://artists.proofprofile.net/proofs/artist/6f1fe635-74ca-4966-96f1-9e02305af497.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 0xfd126b62a102ed7ebd412cab0d80dc11cabdee96069f826df928d41ace5faeac. 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/NLT2H2200495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a68aafc73c8404f71da18b454252a9df52ca3a0aba7bb11d81daccc54c0885. 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/NLT2H2200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84715d85b9385638ca1a83784cc9fe5b1d304384ce6d75e1d4ceff51aa95c39. 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/NLT2H2200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7de011ea8263672a7fbd79d6371187d5fd6ea14eeb5f1d2a250cc0caea63d2. 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/CH7812193340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8081be8b4d435c6aa88b79663f012b8bb9391aa52c54d366292177fdc883885. 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/CH7812194312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a7bb66cc59aca02863c5b037fd86b9aea786d70208abd656af4101e67646b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH7812197625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8e5e7423a8397b7ce1ae4f25ca492e8d6a552988fe4294759fcf3d428045e. 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/CH7812195338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84715d85b9385638ca1a83784cc9fe5b1d304384ce6d75e1d4ceff51aa95c39. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLT2H2200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd126b62a102ed7ebd412cab0d80dc11cabdee96069f826df928d41ace5faeac. 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/NLT2H2200495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3c501c72a266aeab9eb7de3dad3181eeb3063c6196c8d24cfa82bb0e7ea6f2. 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/CH7812198392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8e5e7423a8397b7ce1ae4f25ca492e8d6a552988fe4294759fcf3d428045e. 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/CH7812195338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242a1e7e168c39e98354611b05a0881f3b710a2c1ccf2f12275b886b4d0ba7e4. 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/NLT2H2100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c342499f95aab3da0a5eba9b9a8f3584d710008470f38a29e4b6291bd1fac0. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/CH7812191871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8821b8c8d82642f67cb3a9f5fef6c6df805db7ce14f5cb4268047f4f86bbd0b. 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/GX38U2105377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a8230719d321c9f9c1de23fe83633b65205683092670acf0963622bf6b3091. 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/NLT2H2000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e03a66aa8f6792951145814577ec28f9bd7f63827adaba20816999571a2fc8. 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/NLT2H2000473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b17ab0f3298ce98872bde1f538f5ab2cc4d959476f58c95ea054b825b1d119c. 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/NLT2H2000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8d01d2d82e425151f9b927a55ea3fdac2de6c9fa72fc855097022779689b4c. 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/CH7812425709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0800bcce4cb74ae87277672eed50d7f36fde2a6d0fe107a7822ff8aeaf19932. 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/QZWDD2428774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4eeb8df1109f01588c09f9f5ed651b105f30ecb80f94001fe2cfd8a47ad627. 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/GBWUL2527947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d5358db46adf5f308f363ebc486186e164055515fb29a01ba1e683e71a480d. 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/GX89G2535283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6df8b9fea7deeec9fc664b7b2d7386e08aa2eb5235f336bb3834dc1cea67a0. 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/SE6SA2486481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048ef6d0b4fd708a39dbc5730f9d567312c7500ab5e0d0d27d18f3c16dcfe461. 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/CH7812420090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaa9655dcb12afd9472fd25ac2828a8dc2024ee7e467a9bfcd0e531284750b1. 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/GXBDS2404906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605fec7f7ae50d4610f3ded23c01b64c6e0f9460d6c120a0def35076f5984c3b. 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/GXBDS2436252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c86e40e16f3818f99f44b1ddd511ec50f248d848eb5dd8e928048b2dc79a2cb. 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/CH7812412701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae511a5cb2e1b6aaeb80bef9336480bb07cbf304b6ecea1b8ebf081a2a27a9f. 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/CH7812408609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39918d64672bd57a2e356e97c1acff96e03df02038e196c53c2053d6138c24eb. 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/CH7812408610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3dcad18cacbd2a563534de0622db9f738acd4eff6963c94340093c8e39d1ea. 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/CH7812408611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2810c69038e59e3567d9469048382a1e40f24bf8bddb89ddd1f839d653421b. 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/CH7812406306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4199423bbf4a3895d62be5fd9da56b81e37b2068a80ed58aca42fb6fdff9168. 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/CH7812368043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b41e14bb2b4551e80d058e26f3432016cb4982e46ada3a012a6713d85879c. 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/DGA072378812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04927653c574ff38b4b5bf62eaf6aa9d3c3c005f317d20f6ddecfb397c5dc8e6. 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/CH7812351574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666c635702cf819aef65cef26cfeff592c26400a96dc5d2753f28a7381252b94. 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/CH7812351573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02595ab38adea0d4b76ad67ba094c5108968393fcd71a1cd11fccaba4daa4a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLV62201047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4700206189b80af66990bac6da908aeddebf4914f938d5513f41ca90bc25ab5c. 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/GBKQU2282850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c5de8af8450464d7559983552ddd869cc7d837fa593e75f36490fab71a693e. 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/NLT2H2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4ff3b745cf62b23198f711e36cae5a5c5450a520c37f3d09a92ef163a89b17. 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/NLT2H2100852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9041059b9e35b196a86959a6917db2cae4de6b9417c026d550ffcf3d8816d41. 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/NLT2H2100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bec490fcd31065733da6332ca9812a2dd6f3eedfdb3ac37dd65d4769bf9934. 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/NLT2H2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa297b2fea5bc17d7eff724a52fe5902e7bc48949a930d71f7f9a4ece9837d514. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/CAWHO2028993.