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 0x1f955a0dce799e081b9521964dc01690748665a6326a3599ce065b554d7bcd54. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81f056d3-7e5b-43f0-9cc5-248ee9f855de.json and https://artists.proofprofile.net/proofs/artist/81f056d3-7e5b-43f0-9cc5-248ee9f855de.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 0x93556023e0cee749502f64d735c20ec35a92317a75c4dd0726dc3dea3779dd53. 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/ARSB72100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd13650f137008b05d75f22e9d0c1a847729168479340d5f479883df9f132bc. 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/ARSB72100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed7582d6f02fbae31c445d2f9e9d807d1246b53490ab47a955a21f85c433554. 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/ARSB72100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e3a1c6933678f92f63f8d2bc8c1268f0fb416858658949e907ade4da368b39. 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/ARSB72100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042b907d492ae5cb8971cb54beb86327b10adbbe4456d8f78e40aa788a745778. 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/ARSB72100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b07fa8782a1fb2af317270e625a219f034b61cfe413e636d59f6cfb57519b4. 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/ARSB72100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a06409cfc9eacbf2ccf9cdfad4453ab8e948cd87b78c97fbb4f22d0847771. 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/ARSB72100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029c6c0e3b000852864c515a04c30666ce75bb927bd452f827856dbdb06abb68. 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/ARSB72100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9f947623986e0c6096c9ef7dcb6dd0d56cede841f3b52fb8257bfdf6da2b81. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARSB72100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dbf70b58f78a2f72d436536971f3d4862e439f0b73fbd74ce35fcc329a57dd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARSB72100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6730c80553a3863d17878d117d05d291344cc191787f412c14a910c70a44c67f. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ARSB72100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69bf8626d15afa1ab086d91b14d60c16561b15ff09513d7ab90b585e98534e4. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ARSB72100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afd7aaf2e2417175850bda115ba4ebbc5dd3f24a56e610bf77396b5c23496f8. 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/ARSB71400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac07e11f8ec4c58e6c895da7c97238871dc8927a9c85a948c447b7791b79a7. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ARSB71400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23858f3a43111aebca544199018d44b0bd33ff770273fae6498455a1a4a18a6d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ARSB71400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f62e40c300e2d9501c8c7655da09952fae8dd3122f7ee20e0aff782b78a0757. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ARSB71400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8d71bb323871123186494c05803d1c730c82ffdbbe4c5cd67ed896f2550d91. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARSB71400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8be1f556b9f5ff0094b29eb95ec7a74ad1dd1d73787f5c0e6a5cf35640f8222. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ARSB71400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498720e2fb10306dd5e27873724f27ac3453edebf7b0d43847f4109142d9ed7d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ARSB71400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452f5db4e116d87a42fe06ac3231e8c81da0e39c5bba51379bf05adfd27ae1d6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ARSB71400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecb2e78a240b32cc87f282f8c02458f68d7d7638429c152f32f94c006a80362. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ARSB71400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c868ba1eff2b07c4fef06c4827c953b90b09765c45f775a9f1ca6ad1cfed86. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARSB71400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8b13d0ac2f91b7d4b73b33a12a6674e73baa177fa03e332ea950e029cfef97. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARSB71400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e090d24c4a98c89ec540c36bbf7d8cb744a02061645ef66e174756ce862777. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ARSB71400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2acfba537e10b63874b0b715f89374b79cd11fb4c0ad6b8f41945b3ef7bc1d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARSB71400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1424f3ffdf84118273beae50a53c549d03cf9fdecd86b70f5ec872624e5dae1a. 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/QM7281424083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077716e1799b001ac4932a74dcd835ade1d08d2d4abfba798ee0435f62701bf3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM7281424084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ec1289dea4b7ab6b82a66bbb87f66db937bd6e9aa7f9607a7031ffdcf10202. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM7281424085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67b059d0fdc72b00e6586f38b255e734f77267738352750613334d5a2358ae3. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QM7281424086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0fd01f597b0850b1544c1417e037d2b2e1d3368f505841f16aee33b6529296. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281424087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706e62a71a98f71ab9cedbe21cfcc23fdfefd8971c12d848a350b42756c6ce7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281424088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16084c7ea314f135913e66b71d3113f7daf8391efdfccf7664449dd379413f41. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281424089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb7d8f1d1d5b4a668a6b007398dc0ad5ba95ce1df421f3ac65e0984b343cf0c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM7281424090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30a49b0a43d26ea8c38a517950499382aebdbb2edf4107eb6c78a3e9a0ee506. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM7281424091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c67dc32fbc7970937d081d53048b004265656de6d9f883fd3b62396f598f677. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281424092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc856a659aebc0ad1544b4069a683eb57dc48bf74afe4126f3e5d0ab5134f8f. 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/ARSB72400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ee00b60cd0b8c93521041c5ff1d2074c7303c2da8a5cde8f70f824ba481f29. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ARSB72300001.