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 0x1e2996549494664d11316e14ccce8b228a59f2e6e3c6ce505a531fe16e403aac. 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/dbcf06e6-4901-4194-a79d-4ce440a27e6b.json and https://artists.proofprofile.net/proofs/artist/dbcf06e6-4901-4194-a79d-4ce440a27e6b.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 0x81a740f2121026235f5fcb0fa78fb8e6d750e6ec89dc310e4de319df0f0606e3. 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/QZ85M1950508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc826284e588740bead3f950f475612db6bf5e31b0b3869ddd630039138b3a1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBKPL2168787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9005692745868975bda1b99ddbeb3556e26f08dcc368c1f193d72140b185cd1a. 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/GBKPL2168788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90224a5994468c820019a6fedb7294d3ae960b1f17217e15f406c838a85837ba. 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/GBKPL2149088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3429b2b8dfc4be3b80bbb131b832570fc31a285ded463c3fc00f91a727ce8274. 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/GBKPL2168789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615c2e620f532a935c3e87da24a8605f0d383a0fdbb1f41533fbe861dd4e0af6. 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/GBKPL2168790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1195841c54fbc1fd810b0e203e43d65148e79ec080f2f2ce380b62edcc5cbb. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBKPL2168791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff437a600eb88db241da8ed39f44a46ef28b53ae633cbc0ef0fdff5141794d. 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/GBKPL2167917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b111c844758c4476d2a7bbb704debb7844cd80e936279ab121dce51f9df5b8. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBKPL2168792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c629e0b03fe5ad1ecfef8f8e393ad4394a41ac6e581a0dbbbd70c5a594ddcb9. 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/GBKPL2154378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa414d4e7b4ab634f9d43b1aaae0f7a4ed837ea7c0f829513ff5a4120314ed7c6. 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/GBKPL2168793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1db4c9c956241eed9cc6b327912710b1161c32677d6b94b96b501ed665c4c8. 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/GBKPL2168794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274634a7f73b586283363a8e4efa2c042a420342fdb672cbb7f6c77ed471c5c6. 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/GBKPL2168795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee72f031619b20390f881ea9bb75ffb11904c76080419efd11afe53c51a1bb5. 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/QZDA81971836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7f4abf9a7e97eddee62370746f8a60ced53e74db8e20e8ba9d38c92a480140. 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/QZDA81971837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658101bdda4b1be6e5befc02fdaa814fb697b9ea989367caaaafcfa1ef3f30db. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA81971838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cba71443ce958a142c9cf50fe5911352fa00e111ea8238431c8a14b1a20d7d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDA81971840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2e0b1dd44bc1af6274b035b2fc8202851c052cb81572467dcd9560876b4ef3. 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/QZDA81971841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca61a411708a06a9fe253e18221b672108a20300d4dcb052d346c4f4c27f382. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZDA81971842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c53b67a1f40150d79877875b0b7611aa1d76777b8abc8644e29e7779eb4c5f. 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/QZDA81971843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e94b1519e840f815bbad478bf4efa0ea9eb6a4ec2a02a655a1f0bf4a5d8199. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDA81971846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb959d3a7cfed066b86844a052054da87e4107314551060c84da299aac16f8adc. 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/QZDA81971847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf598f9e988ca2bc87577cb23fbcc44f1f93efb53613cca2b78576b2db6fcafa7. 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/QZNMZ2456055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc83fc0dbe2d0a2991349e69f9a8a9cb7ab334f4e182bb730deb550ecd01260. 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/QZNMZ2456054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ce7e591ce03f0e48d70ec3be8dca4aa0b3d1b4e58a22e1123dd42fdda9d128. 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/QZNMX2370836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf598f9e988ca2bc87577cb23fbcc44f1f93efb53613cca2b78576b2db6fcafa7. 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/QZNMZ2456055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc83fc0dbe2d0a2991349e69f9a8a9cb7ab334f4e182bb730deb550ecd01260. 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/QZNMZ2456054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ce7e591ce03f0e48d70ec3be8dca4aa0b3d1b4e58a22e1123dd42fdda9d128. 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/QZNMX2370836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fb107104ac4a83c1c6910fef1681c9e878b497a806729b6452865914b392d4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBLFP2342427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b543da31816218513b76b0f928b15f153b239ed20a9aebfaeb45789d51ffe. 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/UKXN22286821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09770e2cd617fb19dce5adca8ef780696aee56303c5f4dbd8623119d8f39d930. 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/GBKPL2169164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c629e0b03fe5ad1ecfef8f8e393ad4394a41ac6e581a0dbbbd70c5a594ddcb9. 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/GBKPL2154378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90224a5994468c820019a6fedb7294d3ae960b1f17217e15f406c838a85837ba. 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/GBKPL2149088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43283994374f8b5bfb348b9eddb85cd8b150af91ff7db10447997565455ecef2. 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/GBKPL2142208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0ac94cebb5e50f0b7c880c0cc89b506ad72d2582f18fdc18eebbd9a442138b. 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/GBKPL2009612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bae12972d612ee43269f40f74eb4001c6ec72e39af3db6bf2b5b15d57497a70. 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/UST8K1807530.