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 0x873a7e61b5dbd17c3d6a417db6f7bbfcb5a17c17c75c3e4710908d2a0c272ab2. 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/823befbf-b9a1-4a3b-a7a8-0c98193330df.json and https://artists.proofprofile.net/proofs/artist/823befbf-b9a1-4a3b-a7a8-0c98193330df.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 0x8a316056521df5acfcb126405898c8bad4cd0d37b1fd756f38c8c1c3fd6abd01. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:58Z), 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/QZS642423069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4bbe141aa3d6d5f51d4ef77598add94e2c904383ad36f400a03204ecbc5d3d. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:26:25Z), 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/QZWFJ2412265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0953b10d452d04f99cae6c12f17e9def492b741c203f6eb7addd1cdd29086e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFL2468765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69c6f11e4dcade5e46a865d5c92756abbd7e4a0347382419adbf568bbc59784. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:53:32Z), 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/QZWFT2494607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460923866913e4493ee0aa2c2bf3809d7e2f95b4113d9cf4dacf55f19f709a37. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFV2496609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c6b44f7b565edd2554749ba056e3dd6e83867e0a7361dd5c8461144a27f771. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7K2473591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4582d346cf8d9c4a0218e0679b2cca893dfa9472ef2c37b9c236ab4a3875d877. 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/QZZ7K2473592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7777fbe152570e6edace31893be1c92d4c7c8ff0c2128567a6229d242e1587. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ7K2473596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b188ffcb66694c9313cfa509c5018fc860398181c669f7c14f49868e02a114. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:31:54Z), 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/QZZ7K2473597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593622b22a5590e9e491ae4d17abfd50b395ddd36b0e13eecb71bc4d26cf0ace. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:41Z), 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/QZZ7K2473598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffd2903ddd217e03cb8f3035996ff82c96968ffc8e07ebcc0b774b4fbc334e0. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:51:08Z), 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/QZZ7K2473599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae71f95cb1ad1cc29df2c31914129034e2b44478d9da3543c6566337b7fd691. 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/QZZ7K2473601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6533d55050cad87ddc77b713af6acfab1eaabce289b02a240fde1af75eeb0556. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZZ7K2473603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63bc8f48e27bf1d83846bfc61fe2fec6175e774622772ef1569eb108bbfdff7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:10Z), 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/QZZ7K2473594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa4faf009b6a30150a5c4416f532bfd158e36b8b9e5859d98799f2fc5f4e2e5. 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/QZFZ42585203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0d5f9b4f4a3a8133ff7a24583cb49db81999d6e09bc2b79e33e4ddd47da9f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA82528162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f70fa946cd420727c1890c0b2fea0283b6ecaf740530dfb1217d9cd8274b428. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZDA52590524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a28069a1b6116c40c93c463275d58d4d99152a711730460fe5d874580ee47c8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZES82523626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e4fa769523002722517c94fd44e78c9a1474fa945be3876862cee6954376d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZHN82543925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb7aa0af2fcfa6ac6226fb0786e919b814500bdeed478aa2238aa2d4819cef8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHNA2557951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353a09c959d336f8138c1aeb4f77815c2ce129d46228e1fec07935377edc79cd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNA2571742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fd4cf40a77c36176d4e6f4d42c44fedf2e6392b21c1c5dcafc8fa76935067f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T10:00:05Z), 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/QZNWV2521445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb079ff278243e27f3f8b4882504f1df632abe433ba1cb9693e0abdcde12532e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES82516317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f9b090155c3ae1dd759496b5581869da40afd8a8a2453d2d93b025c9bc61b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6H2540553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a2e91cb0043ce5dba1c2424d00e31b049f5d9b02b58cb205c0d8f69cd693bb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6H2507921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b702862472af5809fe6db24c02c19943399b6ceee3c55cc3a2999a68a2b7328. 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/QZNWR2508634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fd4cf40a77c36176d4e6f4d42c44fedf2e6392b21c1c5dcafc8fa76935067f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:31Z), 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/QZNWV2521445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1117959966ef143063e997d631f262c83fe423e27c6c2212c9dff71ae4cbd1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:00Z), 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/QZNWR2510427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e944b0302a4fb1f1b4d8ba20be6c1cec21bae1b77ebfa71e8923d952086c19a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTBD2540686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75f454b7bc2b704c8a5ee42ec8aee4d1eec8dfea02f72351ba2e783b93cc23. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFG2503269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0bad311787ad1f828d5a0a1c4f6acce7f6464f9616f29e7b2163cf0c90989c. 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/QZWFG2504731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86559e63c29497c3f711be8beb320c6046216f0ca5fdd249cf646dadccbf59b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3FH2509377.