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 0xa7bd0752e21178f8f30b0357d52cdb9cce2357cc7ad0febb0f0b0e9d5f4e0360. 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/46a7d80d-3220-4f6a-abbd-77fb27ebf5f8.json and https://artists.proofprofile.net/proofs/artist/46a7d80d-3220-4f6a-abbd-77fb27ebf5f8.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 0x55b2ee3b969d18e7307d9625d53f863e2ec32419e6ee301fc38a36c5b3c0eb23. 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/QZK6L2499360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9249f5a9f01c84e083daa9a4839a4ea91e378183cc8368a3afe7abceaf224fa. 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/QZK6L2499361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620629271931b649b027d78a89aee2b203e4bfb242b210c85f1260ea3613d3d8. 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/QZFYZ2488235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706042f761aa2c80be846f31bf24776f41f882f2b8e174d4d8c065fc5ce2b42f. 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/QZK6L2499363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413896852d9194fd8f119144f537054cfb5b354653798f4068ee96ffd8f27ec. 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/QZK6L2499364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80a0456e7e8d899aa2e0838eac52c84f8d8eb85f569e52edde0d1e837ba9244. 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/QZK6L2499365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9b71da37ceac2bbecbcce4d40edf17058cd40ba049fb9b40a4a6532e051721. 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/QZK6L2499368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36d9187626e9c00abe506a7316c935468ef5b41d18856b4b022558a113717a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWX2323417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8d03ec13f57d9c575a14fbd93bcd5770f13d4bc1786e7f47d9c4991da55b1b. 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/QZK6L2499372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1091a13000e21a29932236685109640d5a3b1b4c67e60f315a4f1d34693ed53d. 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/QZTB92388639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb80cc9ce0de95869354d038cd658dad57a51af7b5d4955f634f43d6de5fd09. 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/QZES92481388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b364ab550d4f664af8314cd8fb25dc409afdafd39ba6663b707b3dbbb0563. 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/QZTAW2378065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fc8f1955a321a49903191caa2d2e6524620862d50ca850655c98bd2a49875a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMEQ2385267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eda33c2fed0c04bd89fd7e9116b5a85171c34f02f4e739b63ffb4f45d99e5c5. 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/QZK6H2312678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdafa6d3ad1d57619dcae9802ac382c8a13eee9354b326f3690a6519480d534. 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/QZTB52299009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1675087e9d30fdd25bb6482b354c766327657ab077d709891a0e0b93afa400. 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/QZNWZ2126587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8219a2aa44e2c3b6af3b76e6f24b0d50ab3c4abcaf78f42fbe609d9dd6536db6. 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/QZHN82183464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4254d45b1a5cb73631195c1c930f41ca1f53f5307be0a7301cffd65cf866126. 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/QZHN32001789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5787de546fe142198a853bc4a685127e84fcf6650fd1882157766e45bd36056b. 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/QZHN72260050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19620847586f781e399bd0623285cef7188c33df285c91341694c5f985805732. 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/QZDA52206750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349a2cb55bf4765331bcd6c402b8a7a204ef0885ae2c55fae16c96615c116fa. 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/QZHN72260051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a14aac98f4be7b3784e73b7cfabafb4ba0175274a59df4b12ae702b6c748da. 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/QZES62220100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dbe15b2a9176f66cad17a750679b625c7c549ff037e05294356f60d259085b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:16Z), 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/QZTBE2414091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ed3bee4a5a302021791cbdd640beaa018ae5bd011c909d9f847a908d253b39. 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/QZFZ42406943.