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 0xfdf7008b801a2da82f85d3766f541ed16c534e7312fb05d8f4ed20c901b31525. 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/f9e5566a-197e-4d5f-86ec-cfef7c8acad3.json and https://artists.proofprofile.net/proofs/artist/f9e5566a-197e-4d5f-86ec-cfef7c8acad3.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 0x241157f87ab7fee5f26c84580c01038b4747eb9d9fe33cfe0d317945971cba22. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZDQH2398423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c3a22a4da431d18eb09f279a30c531cc15a64d8f8dd8b1f2bab0ede096b736. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNW72400683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf740e6dc6fd78f34847b1e941d070930ebfe475f2d18b2532d70fafc1c9526a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHNB2472522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63ee5bfa4fc79d3a53eae10eb6d955ea2c60366c773e66888f825d8a55d8b26. 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/QZHNB2472524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf1ceafd5fe5ef7ed7b9d2d4d091c54072dc9526d1ad999a761336b07a6631b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHNB2472526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157551d4b3f1f0d08f6b59d27dc8a3d993e48233c569aa8aedcbc24d2f18e763. 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/QZHNB2472527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1798cd1c9c619606788b431ca95c84ac62671f8049fd16271171f8b6e457f441. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNB2472528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f31bfbff0265c5885e17daf47b02d09ac4911f1c28c12686deb500fbada30. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHNB2472529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef1721c3eedf2a7bd62289df404a91669b07f82481c51b1f405c629f43b0965. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHNB2472531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a48aa0cd9b06a2b269396e48c8a878e767fdc24452af8cd4bf88f4c12d8ae05. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:42Z), 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/QZHNB2472533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74f03d39b7ca588fa3c008c82ff711cd53971d69f8603d047bd10a69fc5d7e6. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/QZZ7N2484078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4b27d2ae4beac8a1c2acec83010bbdc44c21759b322f0a741d224654d1bfd8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:17Z), 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/QZZ7N2484079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb325c64ca73fd8664b348046caf2eb9b55a14b60a716d3ac56d0c2d37d4dae5a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZZ7N2484080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ad2fe4f0aa662ffec654641cf0c25320bf1c6742f5bbe46eb60ccc9097214f. 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/QZWFS2497394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3549e1e3c418a7e0c53f8bbc56b57eaf4c9066c27874ea9579ddfae47cc9f44f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7N2484081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6806eddd4ad1d4afa7cb971c1e4f8c6babe1d8dbdc8896e9da093dd19934e6c2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7N2484082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797f926ce46f083aa9b4b2d1e7e5f41589596dc90b16b1a81f764537bf29c30. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZZ7N2484084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e5c80e396f494fcbeb80a9d45c3a3dae61dc4486b1b657da39e4c72ad8d579. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7N2484085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946e19ffdf048819b128688c2506e2fd41aee19ecf60b5b453a5f2ad84addd28. 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/QZZ7N2484086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa0e92577e6e20e8f817e22b581c2e06705f2a8a220d7e8222473634b83cc30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7N2484087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59d016d217c3f230a4ba05628ca2d3c4a979ed887bd9174c1de342307d549d3. 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/QZZ7N2484088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59d016d217c3f230a4ba05628ca2d3c4a979ed887bd9174c1de342307d549d3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7N2484088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec31e80cd667c763d0b383daec09b5a3c7e40b045706301e8b694c4c356ee01e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAT2522422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac20e43ca81bdee1b7d21e6826e8a3c989f33961f1e65f5559fd2092736f430. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:48Z), 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/QT3F92566818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760c2b84c5cfda5d2c1f7171e27e6459b01200cc9b17cda26579b8a06901a372. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3FB2546332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234452c5b0352cbcfaf3aaeb774435562882a9e7c0b6cd479d7ced03554f36b2. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:33:49Z), 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/QT3FE2588716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8edbcc601b0976fecdab03432ae3b9ce2d6f447bb0d28fc91641ac3a0bb55e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT6E62540117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7deb940ce20dc0c650756d9ea53d1abf500221d81db53d0b49cd521aa9b168. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT6EE2550763.