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 0xf272d5c0921fb63af5e9f2496ef46a2f73e8595e9cfa3f304774722336d5c430. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/128de4b1-077d-4321-88ee-bf2dd7636e11.json and https://artists.proofprofile.net/proofs/artist/128de4b1-077d-4321-88ee-bf2dd7636e11.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 0xe34d79dc5acd468a3c93f9f9d2962a66d279e8a85b23e2f53787c6e334105141. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZ5AB1802182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b778d2b5d59bdcbf5222aaffc8454efccb6fa63545f1e9f761cdc85f1434cd. 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/QZHZ51905063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239e99de7c87145e4dd557bb2586c3dc89323dc466117ff8e38aac164573a077. 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/BX1082100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20819c152e4dfd1ec0b2dbcb093781eb84fdaa5e759f87129395bcaa2a856a44. 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/BR9Z22400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5185dda5aa539b11cfb8b7c3861d793d87564c9313a2fe6a17efc6477a45e975. 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/BR9Z22400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc365281176b33099e5e0e2313c61dbacde6d921eeb71fc86eca237ec5dc4137c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXG6R2400718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4378db77d9e540225d520d04b65d60f637a184914fdec793b1057d0de3817729. 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/BXG6R2400719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0cf79b0662598ea2065083f6c5b33cddcdae6f90561272191411966b97dff7. 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/BXG6R2400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b20e0c488ca67011c96008e3e496d1dc1c064006982416c0ac785131dfe2cb4. 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/BXG6R2400721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29462e5380742bb31c233f689a95bd7566352fd90084da4bfceaee7c56bb004. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXG6R2400722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1785d1a4ec14a2ddc934f9be1b285c841baa2523676d06090f957098fa867dc0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXG6R2400723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b55d704c5be6e29ae6247cfebaed707aab40a25fca5e4e5c6ff9d2e89e6f502. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/BXG6R2400724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8aee3e0f83b25039612234a64b105aa734c1d7ea1570b468fb7d5bf2b922bb8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXG6R2400725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2359cc3b68c8a3d4f2ac8a9d97771414b5439fcf15ae4b0abc502126fc18b2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BXG6R2400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525e2cb8ceb9ecc1f27e1c5e8aa33ecb8ef7464bd24f0692d9e8eee408d5edeb. 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/BXG6R2400727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89117fa7e61d0ccaf3254b3d5a0a80459553b6aaf747b557486b33a904b31d. 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/BXG6R2400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6a738e3eb3029aa21c24ff04e93a8fedb87cc665112bc74e8dd950df5af548. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BXG6R2400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a32c0138fd092c94ec5263da8ec2b16f435ad9aaf1fefea5bbf076c21ff0af9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXG6R2400730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06745c2dd5914349aae466264fbbe09d48558353cd76bb727facbe07fb5c712. 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/BXG6R2400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9e927bbc14dfc8f33e27515863d969ee7465c4084af5810a3d59b74ae3fa8. 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/BXG6R2400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbb90ec32ed94f7a290876ae56addf1a3fae05cf56d1ff43290b2a07f1c8fa6. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BXG6R2400733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf768fb09db3bbbdcaa28c6e289050c98091aaefd64691cead88fcc2ddd95210. 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/BXG6R2400734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333ae175410ddb26d889ae7b893e94df7594a21bde7c923fa709a4f8e8f62946. 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/BXG6R2400735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2393b94de230b387fcdeb3e6e3fd4cc69376e06d05067e7dfabebb2dba4abc59. 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/BCIDA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3990af2fc07392d1336f06cc5df6f440984a5c5e2e76c258b1ae205daf4d526c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BCIDA2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2395a4be50fca3f6412a33fd57fac5fcef92ca5cda9d4cb8a69641b16f06c0. 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/BCIDA2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86abc4d0e60b9508918ecd8a57116004cb5444e238f046204289a0259e3f953. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BCIDA2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d2c1f50733191ebf43a359b58b8f8f5a7caad297d0bb8827d4d2e4bac89419. 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/BCIDA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67979ab459366240231f614c766a323851671debe0ca22ac117b90416a2352e. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/BCIDA2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0b15445611788df609917befd0c8b359432a568f05e4f914847aca20559430. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BCIDA2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fbd1d4eff8789fba08f8f49ea55d4d70e558f2193062764d834f49984e89b4. 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/BCIDA2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ea70694a2649b4839973bb95f87d2303857357db24dc969e2ada28f9674480. 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/BR9Z22400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601c30fcb6411808830590620534cb0282b238ff162e1970fac5adb403814e98. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USJ3V2010917.
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