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 0x9509140947a3d3880531b05650691c062b49cde8d678ce0737cc0eb6075bd097. 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/d3fb8c70-b7d1-4061-b766-500be3d5f577.json and https://artists.proofprofile.net/proofs/artist/d3fb8c70-b7d1-4061-b766-500be3d5f577.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 0x5f6bb174bd5e5472a6033ccc210309d301365155acd34c84c14d6e13574d92a9. 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/ES71G2337216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a27d83eeb4fba8f78885e46eef862f70c923214aba795ed1942febf9c3686e. 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/QZTPX2360978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee5c37b2932cb0cbd80090f8a5c4d004f83c60222ce6acc24e5a6ca1d5375ff. 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/QZGLS2331363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf359e6b38edcff2fb8aea06532b13af3d8895481bfefc0bf04ca250232394669. 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/QZW9M2296387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c5043fc5c58ec87db1affd1c1a0c5d8622f8dc52836341c5284a4c2d418214. 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/ES71G2337320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4caf5da24062fbd0d1aac23b1db8d6bf23db7f63e9d30a51ce9976e05ff23d7. 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/ES71G2337314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769e0a885e585f979e016291fc2deba1221e63a8ce7fcb1e539d5d695c22c385. 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/ES71G2337316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a2702afe7a13d73c4efa8781e215daee4d0e98782be58325ae8db69b159f22. 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/ES71G2337315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c5043fc5c58ec87db1affd1c1a0c5d8622f8dc52836341c5284a4c2d418214. 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/ES71G2337320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467c88a2a0eeb9510f56762209151466a4fadac7a4c1d828156bf0477f957278. 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/ES71G2337312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e3cfe4e14f72fa643f1cc8d76eedcf0ea3cfbd847a31d1f376cc5daef2cb6. 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/ES71G2337325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6bb174bd5e5472a6033ccc210309d301365155acd34c84c14d6e13574d92a9. 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/ES71G2337216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970f46333dd50c69781e6dd54386f735afa765cadf5bbf5d521a21c3712b3bfb. 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/ES71G2412252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64657835d48a739376262e6ec5079998f66ba98f5d2a5f114761d577db56df21. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES71G2412258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5f29554e26c8166eb03136b95c68497563564b93a36cc8f72f611d014817d9. 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/ES71G2412254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced4c3125cc23fe7b076d0b1623407e88412ef6bb415b7d6a9c8699c7ca467da. 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/ES71G2412256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84197cc294c7bbab0e92c1e267cac1a6a3f6cd3b53e75b89cc89edd1777808c7. 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/ES71G2412255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35338a8358622dae1b6a9aa627eb91372012eeae28e0b91373b2a672ccc579b8. 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/US7VG2480983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e3cfe4e14f72fa643f1cc8d76eedcf0ea3cfbd847a31d1f376cc5daef2cb6. 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/ES71G2337325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467c88a2a0eeb9510f56762209151466a4fadac7a4c1d828156bf0477f957278. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES71G2337312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74707a004ad6982e51191ff63a94002a057a20a69ac6333ac6db0c8d8e0ca865. 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/QZNJW2346548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc557521b9852de5082fc01884d315434c2e42e7cc6f5ff2a163ba5ca2f1829e9. 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/QZNJV2366325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebdc2d0836080778c5c05a77488c4ece1df9e6d29359f9564529eb2973ce4ca. 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/ES64E2301213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc991cb41714c595ac03d85f03967dd38055bdbd905205e09030e446ca70b5f3b. 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/US7VG2368928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5165db01a4e4fd079c0283a2279b191a2c5bcd22372781b49d911358614afdc. 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/QZW9M2223634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf71a191c9240cd9528c905063c25b5fa776cf376be375253a1610d55fe864e4. 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/QZK6P2295896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b96485d81e0cc6fedbf6cf69d0a4452386de7fb215e58238fbb77901941253. 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/QZHZ32265070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e72e6212049539f8a36c9124208098aa0cdb894e99474ffb5bdb0f0bdf068cc. 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/QZHZ32265072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e0cfc957f2873c47847ad1c9326d8c1c281bc9c624cbb665c546e45937762. 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/QZHZ32265073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb184070eeb66afabc01678a3bc140eb5de56da152e0b83da8c488da278a8e5d5. 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/QZW9M2200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a84662e1c5b7989c52d2907b78fbc293f0a7acb60a6af18adfb0496541b89cb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:57Z), 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/ES65E2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899dd29a7af8d8711bb09a11c756347c8917e1a96cd261adeeb52f751f561c2a. 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/USA2P2162094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a62becd8b25c5b6983c29d57ce28dd76808498a5b4c585c293894ea3703326. 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/QZNJY2109423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761311aad246056c741bbd8d0ee54cd70b34d55d4218d9339401a4be009c6635. 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/QZW9K2330647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49c733d55e711cbe5c2755ec276fb3cbb3efb0705ec489c56ffbe015c0615d1. 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/QZW9L2232199.