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 0xd1b6d880a98f7225ab5a7f27221b3ff7414115398a837594f9d8983f8e7a231e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f075ac2a-5fab-4ecb-b6db-3b70651eb797.json and https://artists.proofprofile.net/proofs/artist/f075ac2a-5fab-4ecb-b6db-3b70651eb797.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 0x3b8e4287d52c5f1a12293659ae058942dbcf4b8353e836fbb30565a9764bafc5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ32477377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad0133d7dcfbe144ce7c8229d7d6cb34e3b8602ffa590b5ba4fc4df0ebf61e5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:57:42Z), 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/QZFZ32474102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad997ad61c17139b1467ddc6c28c6b7d6fb7c7280ebd276c653895a00e309d55. 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/QZFZ62488643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b666f58a3f7382a5b61893cde14e70bea425822de60b04e06094c6b248fc5fa. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CAGOO2477177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d92a02591953ea0a273a46cf19f38a496ba88c7a6d3a5930eca55a5b0d28cb0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZRP52525821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0445ec34f666671ec8e2beba0c29a68f75f8e1488a0780421e627608feca2fb1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:07Z), 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/QZRP52525822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fb4758eea16b7a678e3ca0afff54ef684d4e0353b25aa9e5a720af76f04ced. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAGOO2478136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5857b43d1ad2ce7b3f5af26e3d41e80beda28223f5195e3244eb14583aa1c18. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:38:00Z), 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/CAGOO2477224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffcf1ff35185ebd6c817a6a13b27835ccb570d4b814f530fcfc46fd748a0be3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CAGOO2483949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954ea836fc2d3475d34888f54d2b80107607783850d030c7a4f12fd691fdca51. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZRP52525826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebda193d91db438136644608b5ca3a501a2e819910e0a3380c6f797a0f3f866. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZRP52581659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb495e5ec78b50e7e582edfc9ba6bafc25b391368ba1c615a2d1e32e87e55e18d. 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/QZRP52537154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1d4ff05aaefce081ee4f6676f0d16b1dd85972b5ef25451faaafa8bafb98c9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/CALVP2433073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfb4b9af1a8ce239f3b6571ae341c38ba425dc24b60b5f5845e50bc4b50ace0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CALVP2433125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f073c912e06a21000d1d8512796a33cff0ecbb9de2b6767d943281529ec6f7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CALVP2433145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eecee88f88aa12f5589b5272c6c33a5499c272414929ec7e716f47ec55b8317. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CALVP2433146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a08a2fa0644089abecb39e40f232e95fa2b8c91a5da19f0a641d0e9b06c5a8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:19Z), 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/CALVP2433139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7377028ce15253ca58dca64e678c0848ed4f45a9812fb3361b89125b92846. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/CALVP2433135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee6e316e7c1c287125a48bbedcf949681a62e347d6361791d55e8df2b4bb7e2. 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/CALVP2433132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d607bffa483e10eefcc2ad1bcf20c4d89c6311b5573ad0743418df88822fb2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:19Z), 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/QZTAS2572857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bc1020e5ac2541e5e4b071a798e58adf179428fe2af9d5add5109822df3548. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2572858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a35d109afd62d4c048a6ea753fa6c82a8502af7969e15825adbbd3d3e6a0b2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2572860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf9aeefedf4db92e393ddd082a01e37ece6b32184bb825aea3a883f3419c477. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:09:10Z), 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/QZTAS2572861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a54afd1cce3a94f9418599de5c328faa91139e3c2e22e0f70916a1dd772385. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTAS2572862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244024fc146eceeabd7974cb3396c3aeb1b3aee4b9ccc1009ff0e0b575c38b38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAS2572865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e863e44ad7ab8b9f47564c9c9c999886933d23ddb766880e6bd9aac53dbcf4. 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/QZTAS2572867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c04d60499d6dcf6cddb1981d80f8d6d555e67093a910980fe548047efa9c5d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:00:35Z), 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/CBF8B2447118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db4fa230d6163c424b99dc143558c279a75ca1434dda112e1596be744229ace. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTAT2559321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bf22784e3ec002b62128f8a22300337278213f93526f85d8fc73faca0281ca. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAHQJ2548244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961736dd8cf3ea7c6eed71e5492191aa5141d693f0049eca20aaadfb618f93d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAT2542000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbc875df0868198d047c45fb86ff91f6d967d2503c229178d10ee2c27d54e60. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:09Z), 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/CACWV2508866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7983bd45bf1f4e3f1470e203559bb402d35a626fb0005e6424a054ac98268b1a. 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/QZTAT2539531.