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 0xbcbc006f0fb716a28175f47e8b6c8442a85df19060b0409a6043a689d55df4c5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10cd1be4-96f7-4c1a-abe0-1b64e79b7f70.json and https://artists.proofprofile.net/proofs/artist/10cd1be4-96f7-4c1a-abe0-1b64e79b7f70.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 0x2f407b0098a053eb828c7bb4b16a7b2e4ab2c9f3de9982981f69d586a360290b. 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/FR6V82174366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3015b0791affe0bc8005c782650eeaa9024368ecd98fdce830e762927bcf03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V82247027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f95030ccc5e9bf98ef180266807161a0055b3dee27ebc9104756068f1f21dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V82174331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404a972d7f372cd2eed40f67fcc1af0700390de583a3e4010b89e99479560eb3. 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/FR6V82174330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d5db3945dad19cbf65e4e054cc3f499f777cc79591a832bc1bd06d80dc5582. 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/FR6V82529964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba232f5d44c9437a4a3ab0f30a42e25eaeec4ee8c586f6c343e5cd71a90e582. 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/CZH441401063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8027326ce8045a26c171b3cf9ca3dcca2c6bafa5581fea2a264b8037b925f60. 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/CZH441401084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4195498d7fbe399e84412e2c7f939cca1275b8540ee2affc04eae38b982ceb18. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZH441601773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698a7b926cb3e305d89b6be8f89b484a822df7488bbb3c83c00d6460ee71d0ad. 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/CZH441800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b1020faa8f585bc9e4bcd7af93656a4ace686854c10c4ceb036ec608ce35e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZH441800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de7bbbc5c79e604e79e634bc69d52352b0e77c3347d265c45de8ac979b78313. 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/CZH441800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c0641b496f390066e2cd392118c05712c00cca6292b60b28ae12822510c7bc. 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/CZH441900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e673141137c590f2f5f352b36ac2c9e7bc67696ae76fd65837cae0ff7dff23b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN91990572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7fe266fbd12f7b27b7e40fbd1aac31a376cf16c3edb8a61c3ab3c12324d00c. 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/QZK6P1983797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c04220571b233237ec84ce6bba71d18ab6d653f9a2db04d90d35e7a9a81d06d. 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/QZFYX2103688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e393a43553d68253c214b1cc434bfa009840f1cab42bb3c524d332521630f5. 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/FRX282156663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262be5fbcbc77667b40aec5e24d7c3a066a9b709b98ae8fb41d897b8f8ff7dc9. 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/FRX282156664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c04220571b233237ec84ce6bba71d18ab6d653f9a2db04d90d35e7a9a81d06d. 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/QZFYX2103688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df1501b64fb5eb65df00ebb88ef90ac7bee3141b0821d21ea23279791f74ef8. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/FRX282156665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7256cf4fb0f800c5be214a574588dda883c988fbfbd601ab81b1f036221214. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FRX282156666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c363c344820556dd326e4775439f8d63be7eec39e569310f3ba4cb7aea8590. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X42388280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05a5b33e0f7ff3fd468e9534a91658ae4115772b5efcaabf2b5bf2b4796b0e0. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:42Z), 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/FRX452301191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd558abd14c21f082109f5d52256e3da3751da0294b0afb1233b57689121964. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:17Z), 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/DGA092310275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314d87f5a34647c985791b1251a091e60ea30e9895e47d80574db0aabb0ea56. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA0M2366836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a573594f6463fb81a55eeab70c94a31c42669f965066f9af536675134e9da6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR10S2438382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4377d01ada3bef4d55a6cb066dee663fcdc58f65c76a0b01517a9ffc955289e8. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR10S2460308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8f64a90bdee48da6a192212828e89e170a07ecea99cf59f7e37ca6fe9fc2d. 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/FR96X2437034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24995ed9d2cdf5fb64a4dff2bd499b1ed29d2ef0c101b9bdf7b2e09042a5c502. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/FRX202466955.