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 0x58aa6fada8b86f6d2f2d54ae2544565b837a8f78eb65fe3a39825178abb52c56. 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/42d85f77-219f-478e-815d-532d5d89dfe6.json and https://artists.proofprofile.net/proofs/artist/42d85f77-219f-478e-815d-532d5d89dfe6.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 0x866e1758ab49690804ade4921f7715b73baeee30c634e27b652f4ed7bcbf7013. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN1962906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08424de0f5cbacf77c902153dff4fc29313e20806cf3a9cede23ba155290735. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBKQU1807082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64437a4984061dbbabddc7fed123cc445970d4e2577ad7caaf3f0fb9e4ccf346. 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/GBKQU1807085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc7ca0805c5079d9ff70d81a61f3eca79e59b7537ea4a9883f7091af20292f4. 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/GB8KE2415577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17d7eb545cea9c39bcc05133864839bdca8db6dd10cfe1786a73584063b50c. 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/GB8KE2415578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6a0c4e8f96881c80f6524e9c0b61e2858f6d3f12019ea2274946d9324c6851. 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/CA5KR2459172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18afb4cd896cfe238fadc2bfde238d97b60408ecd4aa4a30f1f7d518732705e1. 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/CA5KR2459173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d68e21e2a84b05343c42208e06236e2876993028a24d560d7d00da81ca6a2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CA5KR2440278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b3fa16a65d057fe155b7e2eaa30a3123ee36eb474aa5fda73acb3ea532739f. 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/CA5KR2440279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7af582664f4f9f6d2f6876e4219d22d122201150aa45a22bb4e6b7260175092. 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/CA5KR2440280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fec28aa60ed00124aa59c28386c13575fb18191396139f8f1a138dacd524cd. 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/CA5KR2397913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a54961b6a828ae31c0d40f8d52a50d9fb5b2a905b8c5a9f4208204db3ca2ec. 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/GBLV62310485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc009ec7eb3534b7ff4c13dbb0f275936edf828118c468c72a3f31621cce498c2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBLV62310486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e676dc5d290262ece19a936102842405f0bfd5b0485dbbe22d8e812575c5ed. 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/CA5KR2356184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18698c7f6379d53c279f0e193743d00a4bd6416b363b5f5d7363ede6f60bcdc8. 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/NLCK42233398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f56239c37e216ce981ea305ebdc1a207b35d9c49073f41da89ab1b141ccff6e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCK42227451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864a6e7b9e1914d4c8408dfb07d74127b7d56bb7381c5e827b6eae389a4e3ccb. 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/NLCK42227452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c567b92e0ca994ad0be16d7589ddd2cc9ea085a049eb2c1b9fdbca5eed52961. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLCK42227453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad776ecb756fe66f0018783a9be2d8e3eb4b7440bfd67537df44b026e4197799. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/GBKQU2323278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347ef1c3b8fbd84e579ea8b5a4b109e64aaf141abbce219e05d3ee65465e4d4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2323279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa751bf2e3280203d535c7f49dfe1f985cfcefe4c95fe7dbd1bf4a7afd33e1a15. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2323280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4607dee83292b400562fa57c05bead673e34611bc428885e5419825998498db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2323281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe319d4bd10843f59ed2c012091686908af542978f70dc04b33ad5baefc78ad9c. 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/DEAR42332550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e83b6fef22a8f0129049779a91cbb7dffccaeba9e667cc84705eca9db4c090. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAR42301171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77f103f65392d200771d867b64f629e8e2dcff97b5f5773a17f6795a2744451. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2319997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b1c54ddba272d984ef501fb7c01bf1661db081c4c58638eb2580d96f053765. 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/CA5KR2319998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23d5d9b48b0d8e6ce9348271bce54755e4a4be5e63d47ac17e2149f2ea61620. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2266835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01277e5561b9d8f5a013ed6db0c73b077bdb365697ead5c13b036fe0abce7431. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLCK41079284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa485295b02521f124b28e786b3a6b36a750ae71b2f5979c7ff0a5e7f258ab8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLCK41071917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0383f9a7a1d12b849f82a3b4735f32a788d1ac20cf31a414f49acf0f34d2491a. 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/NLCK41071918.