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 0x318c887cee1299728308381c1e811fd19622dd713e36e1733be040eea902c112. 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/c5fe1865-abe5-4f35-885d-81ed95d9d3d5.json and https://artists.proofprofile.net/proofs/artist/c5fe1865-abe5-4f35-885d-81ed95d9d3d5.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 0x26148a1777bb71ef343e58f3852ae08af9b6c86b0875a152b9bbc10934e14359. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZ651709361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998173d4533ce3434dbb9282560ee0ef3e94db8c21c69a71a8675364ff6a88e7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZ651709363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e892d2eb65a0f015224f3c4b90d8e7bac6993fac0dd274956448be6a561cf1. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEZ651717230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a7bd249113655f3c21bf4013f579410b5ebd467eab05bda7521e8689c2a5c. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/DEZ651717231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6da8df769b0f11b672851a54c176ed0b0f978e855f3844a95682aef8a0fb6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZ651717235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf2b26fc6f3acddef0b6e9969515c7b76a53d8faf2665a17c96f909adc4c195. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZ651721235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cf3cfba09205b55650635d58da9a9666433eea147a215d9dad1f1379565423. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DELJ81814677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c23c940393e6fad7a3882ed23c085c4de4123e2db02b624d6031546b81c41. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DELJ81814680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048aac38a563ab750cb10f6362f19650345e61c65fbc6ac10feaa896bb2f7b18. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEYA11900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa1ecc968c5f100f8f76f3a986d188a6f235ed841d496919948b6bcc35cf676. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEYA11900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e26c63ed6cd27f66f716aa36c33359e3ae6cbbd993a6a335cd5e512dba47a3. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DEYA11900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4915d725b8e51eec5024dc6a6f8cf13d4282bcb3e0f51620bd631d58583d51. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DEYA11900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e80768403099f89c3c745a57da808b95cf30a4f08d934b00dd7fca094bfbe. 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/DELJ82027284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ad158aa2ee1e5c3c32c41a02a07aaa43c04eb09f522a5cea5968cc54c499de. 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/DELJ82027280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f692d308b39598360d18c9147249f14129ac24a3da9bbde5b1da534e42f4b50. 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/DELJ82051779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6b38fa1e4e18fecf6c5f8e58eb2a4c69e012690c96a605c109a8c66dfba500. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DELJ82027281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd927c176e08acfe301de66988daafb1af1871e39741796bfcbe365a4b78b441e. 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/DELJ82027282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780556cc5c42bfc191bbdf11b8053fd28b0b3ca485f5aea7c396d30443c1ee9. 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/DELJ82027283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282c27089d97c57b29b2bdcd801a265ca7be408bb1f0419161eaea639696461. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DELJ82027285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8c99b67ced05c038858d5c3329541f66f71c948ed35716df81056b61e06152. 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/DELJ82027286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398edb215e4339bfb9a959314be03c00fbe067c734cfa904a1ee9d4f2d465e95. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DELJ82027287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dadf5416cdc70c52765d13906b576410bb3e4354f10a26f59a8518eca7e855. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEZC62194506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499fda2fd674eff503d24b65e6b7c254cf2f50a92a50105b243beb4246ccfcee. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEZC62105275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dadf5416cdc70c52765d13906b576410bb3e4354f10a26f59a8518eca7e855. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEZC62194506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cd1d238e8e71277fbcbee5c741fdf940de549c50aec981618b6ef9fad89615. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEZC62116454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a363028f3482886df76cbb80093415302a20b425940b3e908fa1a8f6b4eb4bd. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEZC62120393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1aac318eae3fafee2c83048eed273bda9054c26b39d8bfab7ad6051c1ae63d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEZC62120394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae26225da075d0d720ccc78da22ce7f6070122836112357c5eaf13b087aadff. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX762239872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dbb7d7b300ab9fbe0dbb9a9cf2fdb1ff2927a02d99b64788858171b33ca784. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA052297683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dae7b10712a73cad4a6facc1099c95e2a359586c377229c5038365c1a60716. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA052297684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd456f40fc7c758d944da8c101db92b39fd2a9cbf2cf0350f90584f2d1cc7b330. 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/DEKF22100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48177e4f00b7c658af608d054938b0bdc8e952a8e38cfd7f6ae5d255910bca82. 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/DEQ022116402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d93065c37f68f8f2bcd367a029f6472c676d70f1bc16ddbe18007a534108f8d. 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/DEUV91600123.