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 0xda9d940224f15e694d69f098e0f54546315426b0c333523d306cddd4a7e44af0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/168f2261-9739-40af-bc15-2f74a5dd63a6.json and https://artists.proofprofile.net/proofs/artist/168f2261-9739-40af-bc15-2f74a5dd63a6.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 0xc1517cec02d3a3d856e2ee18becc8438f06e7bad4989a054a2c15e55e01e16f4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:43Z), 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/QZNWU2279252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f37043a1cc7914c72171a9224b5cfe69a89b9fc8376203cd44124ee23afaecd. 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/QZFZ62316841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02d92d0be0cb4fd4f2e4f0a8621ec4e89e37b1baffbb74c5e3bce1815442305. 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/AUMEV2360988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf427cf717948cecf6d702ea7239b82299b431aed063ede29c7701894bbb70f5c. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/AUMEV2372719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171ded22059dfe93a6f93122ce1f6babb4b3079caae999a72a3f2c1056db3336. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/AUMEV2372729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5491dfa56ba2942abec4782f2b09304fffcd9fe12806b364b4eccb409208e809. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUMEV2423552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56fae1177900b73c10eacfb349b23b8646d03e734025aae7bb3631fedff5c5c. 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/QZRP42442138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de3d6fc1998ba4cbfdd04fa2f9a826485caa09a89b710e167c8b6f44632ffac. 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/AUMEV2510439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cadcef7de19a0edfc5c1e0eee7d2430aad7a8d734b03cb91464588131498bf. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/AUMEV2536071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b366a21215f4c367ecdf868a7e123fb132bee71ffd51d26cfc50eba4bf25e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDW2569511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee45f7f2fe49f0d951f2263419da6ac201c453f5609fe12e5d445f7ba334d006. 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/QZWDW2569513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8222fefb1a851538dd2b886c38fc987d79be89f78838426797310418c35936. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDW2569515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dc989865d329f14cddc67a9c95fba05d68989bd487ee901eb1ab1254ab5872. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDW2569517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe997fb9e96b241668da9a8722b1912c84d3907424bfa92c957ceb187ef278d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWDW2569519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d0f878952249f525fd356cf5e5b483c7cdc7016745c03e09c998925ecdc0e9. 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/QZWDW2569523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c260084b043911b9a794ded6e799b2933b752a5c2149761311def21a2760fb. 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/QZWDW2569525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f162deca765e20adcecd86c033bf137028d1002f3d97e5589959181121274. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWDW2569527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1f201ecc5d120f4f3afcc5a41ab0aac46366ed5c51b8c74844ea780666a035. 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/AUMEV2569962.