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 0x3707604b365905811a800aeecd6c3c71a84e85fe51f4d8d78563f7796151b85c. 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/0eedca2b-30a1-4cc5-bfbe-38a8e5f80c28.json and https://artists.proofprofile.net/proofs/artist/0eedca2b-30a1-4cc5-bfbe-38a8e5f80c28.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 0xd93ff2b46875a18dbcfb0eaf7b4a1f0553073128bb029952d0708f26573664a6. 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/QZHNA2441726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d860a26daefbbaf29e7673906b7e5474b8ed29649360d1c462b2190902f61fb. 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/QZTB52418445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914b65fa6a8efdd9ed4aeaa8acf4e57973b0528d99ea52c8ea330d16c93c4fd3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTBE2447478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b735e394657d0f13d6e50a9a86003504d99c3330376f521fcffbfd6b0cbdb36. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:38Z), 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/QZWFF2407732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea020a1fc1bf1220dca9b4881ac7c53f7f15a0bf35c6f4b67e6974305a0857b3. 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/QZWFF2407736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eb77590b3d45234a451b260e2dc53bc779afeba4d8409f29902f13482e165c. 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/QZWFL2459494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54610cab8147b5ab40cc382e4adbe2fdff21622df5c9731707fc7aec3356754. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:32:48Z), 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/QZWFV2433049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9291d9e6702d2db17f823c4eadeddf7e20f50a2c274a0ef4483e1e1c972a5e32. 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/QZZ792400863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db5fa4c0f27d2b93d8fa390dc5318db2bc5debedc2c1a89eabe50a19aaea026. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZZ792400864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098570fea6bf4f09c30961189ac58a7343d00960d97d9d4c74145746365d5cfc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7N2481263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597078645e5650ec6951c1613906a0e2bdb9caa0931e9fa3b7349275623ab167. 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/QZFYZ2516036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff8a58499ad45220db53e6a2dcfa9f5547e5535f83a4dea7a8204c2e9a541d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:28Z), 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/QZFYZ2516037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052e776b73f63adc0f8fa10627f0be038e01cc84d0ad8ed0241ba01499054bde. 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/QZES52532632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c0b5cb4886c1d26b2241c0e6f19c7f27d3e54af21b1b11f8084ae90bba144. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZES92503521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9735b196fddf62658a4cb5f7b3ad82828d19518ab3a770cd3a8deca03ec9f321. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZHN62571848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50a28df57b8e579e23fee46bc7d219c274baa240b73b2456f183f596315152c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN62571849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b18ae2a961f2b2e9604ac1fa344744a1ce77c4700049544c3940dba60bb214. 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/QZHN62571850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349179a79062eb06f98f51171bd74bd644af0dccb2a83292aae0bd461eb9deb9. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN92592277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8607be90523e4c9ce58619468594ba01c4e72b7f3de8284c792ce82cafcb6f11. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:05Z), 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/QZHN92592278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2bd9ffb211b28cb4026e8b41241a21f1909651850b517fee91e5edcabe2d52. 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/QZHN92592279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a988a55bd6f158c88dbd92086c87718dc937f746817b77bf7de42e4547fdd. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:01Z), 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/QZHN92592281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58d5cda2eb01403db1f14702f4aaa854ea23ac72b826f2422d1b5f76ae2832a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:39:55Z), 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/QZHN92592282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53150607aedc68ca817421b4caed120f7ed869f324d65cbb6fdd88a74968c2e5. 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/QZHN92592283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fe04293f107ca92766a59988f27c1f854cd460d0b31bf320349cd0847eb5f3. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNWQ2599105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c9c7391c7d681187ff587444c8ad375142874b40d0fe543f1706b21faedbb5. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZTAU2523386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47602e103871142a634cfa60c2722c8301c0d292b45d5612a7ddcc6a96f3c4d. 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/QZZ7Q2586115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42600d10333d0d9e23070925b5c0eb6c4f06f46905e38764d89aadc8ddecae3. 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/QT3F32522521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3ac6c17f5dfcb8752a7f9cca8c5457f2c450ba47d163bbb25b85995b8ca6eb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3FF2586577.