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 0x1928dd5c7a9044630319e7d48c98a9ccca49b5f486420e42e410ed5ffc64e924. 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/fe60973d-c487-49e8-b32a-a26ceabbb3c5.json and https://artists.proofprofile.net/proofs/artist/fe60973d-c487-49e8-b32a-a26ceabbb3c5.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 0x7c7f35da0de210c729bfe6e696febe2b9c0bb4d0f7ed9a2328bab9e0853763f9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAEN1943676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d43a2d65355aee0e5ea1434489a35b1efee3d62cfbd70f41256dbc7d81962b9. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZK6P2120750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db603c6c42a2aec82b431b9915d3b0936f2459644809b0ec1fa2969de3681e1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6P2120751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fba86519b1299cfc3a81c5686e266390d1c51c1edfe0affb7a567571eecf40. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZK6P2120752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36aec2993a450d46af4b20326da290167513bdbfbea1eb7a0d9c59abff0e2d1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6P2120753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91089f2bb4c8db3f00dddd6f492ef8e42c22a7e083d389339a01b714ae77931. 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/QZK6P2144488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0313edd756b3820dc0724832f46c868bcc2d145dcc8d2cf33bd1d1b51eb2e2bc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6P2120755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5411ed9bcd34fe2787d58e28e26105c2da3f00308917eafb8b6c1464e23649a4. 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/QZK6P2120208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18f27c71eb8a586aa909f78be0da387b6e28c63d0721836b60d1c354f63d43c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6P2120756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd075877021934f9cae32210ddde35b8ce955489462638611193a7223324b8a9a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USDY42214104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6330382bd640867a28dc3be046db30c2fc8fc36c18d21308e05f1ab9d07df343. 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/USDY42214105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55be60bd0d4e08897e9b9539483f373ec5aac683387c1de9f72db30635078937. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USDY42214106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fa56e08d4073cfa24b549b648b7063d0ae664b5c788de573f0bde879704b91. 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/USDY42214107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c212f2080262fc410d506b08f6ff6d8b8f560bc5119caf6270af50d63081cea. 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/TCAGA2253031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf545d3ce0a6f45789746f974adb95f9da55e13ad613c68af3a15af22be6a41dd. 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/TCAFU2199149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f510d9c33950b65f9f6aae484e79ca216120de427e1f3ae7e8045b95f49f912. 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/TCAGA2253258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f06d38da672ff5b0c52fa51e5dde966fab0da0ab515f342567582cecf0e7d4c. 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/TCAGA2253275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d97e59eb963249512b89f12994bfc2003244c7559c9e9e19a2afd9639ba9f4. 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/TCAGA2253282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8988848a044f7dcfd03a93a5f933776870af6065b892985b41def59a5704ab. 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/TCAGA2253315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe995a5fe5f3d8ba51a705e230d419dbd98d451a2eea19a4c04de1e15a6adeb2e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAGA2253342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13f1744151e2feb4cdd88145db55fd01d84a47c55b48f092c5b94f1a45d26fc. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAGA2253510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef92ff230bbc96132e7758f48924e4f3fbf5981f8147d22f718463ca07373d7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAGQ2247686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc210aec653bf97acbb405e0c7cc52873b0da7dc5c7117c26ea6e6cf75aaef78c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAGW2342279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6048b3af68a4bc20b85bf9e4aaab0fd8c036e301121f97f22c9c09d9e0b44af. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAGW2342311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573cd963542db6cc02faec29400b7758c55c62e7d2db80f5d7593c150181cadb. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/TCAVW2342330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051bd9d0e0ce4f098a7927edd99b381b7341e06ad095df8f932ac3f86aa8f941. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAGL2278611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57be0702d48ecc0b48d11a8737dc655d8928e7f78ab67c29d78773f2d5d1ded5. 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/TCAGW2342414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a8a4c7c9f68bbeafb9f68e2e4b5691dc4c86832c534a74ed3e8fd466554266. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAGW2342427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3298652754fa9d2618ac4ec60507033b0c50c735151bfe9cb2600e9a8ee2c06. 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/TCAGW2342471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38857469edf50db4a0cabd3649f1cec15a7f435340dec838f070fe66595c1711. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCAGW2342498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccc4ba77f89bf72e248fc3be0b5bb787e331e3a83f5149741398a5404d91bd5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32420722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e9a379b9cf681bd9ab54707f9aed576493cb795fde2312630ea1aa2dae76c6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ72404119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4429e947bf5602a7c45be13dfaefabaec7248de53eb358e7e68278f07aa9fe74. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6M2448891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4547eaf65b9220ff92f6c0e1c683e7a05d96794688723f711b0089bfb9e01ad9. 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/QZK6J2477859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa7c6bc8fe97092f4c829caed58287b4937a0ab72d28f0e1c006d0271a5d1a7. 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/QZMEN2490868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad27c7ca6018951008b66728342d0413c27008c8728850ec89f78cdd3ffa36. 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/QZMER2463110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc531652ba669d7cba23698035e3a4842846cdd6e2fd6087d4f4ff6c5c926c09f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZK6Q2577089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01062daecf3137b41b0f216de6ac51a81cddefb3069b535ab4788f527370e97. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBF2514835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de124f6cf52e405c68d5336bc83c59efa68c3609fa6221c89b076ccdb93cdc9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFR2587139.