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 0x9a7084b46e91f0ed83df286d7413cbf4402927c1bb937e1d85947bbbda327e8c. 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/3a0084e3-1da2-4c32-95d0-76b8671b638a.json and https://artists.proofprofile.net/proofs/artist/3a0084e3-1da2-4c32-95d0-76b8671b638a.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 0x7392aeb94ce022446ae544654ccdcaf82618e38a1969898da33263d36ca63d8a. 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/TCACQ1697899.
Nothing to a Killa (feat. Bryann Trejo, Arize & Hood Saint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa778b50100f041ddefb2947868e2c92fe3ee5d2e8ce06e1d7741a00e5a485847. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCACQ1697919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab4fd415aff015b8e8347af6cfda67f3950eae521bdc0aa05c2b51b0d589fc6. 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/QZNWS2006100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8afc890dbb12dceec6f1b15ea9c6700065a57148b0e58e215d8aba6e69c8a4c. 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/QZNWS2006105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a64365e9b412ae848b2511783047cfcbe107fb2f0b3c48ca04065110d468cd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFJ2137065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca371235429c6ad67dd5012e0964ad4593bc1ad414e31a1b725089bde7acea5b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFJ2137077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0747969176d616f74897d82c9ff0e05cdac5a7799e91c57fe3651fc0b10e3e0c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFJ2137090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af75160ae391f3fe52486ec0cd4e077a8e0f79fe8974a991f99077c77156401. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAFJ2137099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aed5d3870752422ba55097679934a6d54456b290662105c31cd3009cecdb87b. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCAFZ2284975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86c5ec6ef44c4945770270f76b548c4be1ac31c888facde4057493dcaec3831. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAFY2107568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921769f0ef3253676ee2c3e4a75679354af649d49b3e41f539f13169ffed9e4e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAFL2137281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12d7b2b91016325e69c28afdba58aa27e6af1198aead7d34ff17d14e7b53fc0. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCAFY2107595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc64a330a8b9f710b567e87320b1a436da78c034e373cdfab71de6538a31c35a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAFY2107604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4108595b6eae54518ab051da1664e814ff191f542bea2648a5a40a465d56615f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAFY2107610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a313e8640670bf7ece9bacc1109e229e932aed384fa9ec9edc0e5697b32a0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAFL2197161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe102f1dce7979d03e97739d2d057f35dd73d74aeddc38db809e17d2c14296a5c. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/TCAFY2107617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a8e813d8e01ec19574cf54dd6667ec9b820a22fdb5271b82e5c6d3cfbd61dd. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAFY2107621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fa8805f3cf14379d02e82feddc58d9fe704bba2f97e677242f5a56f9cba46b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA52241057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe267c4465b11c9eec877b4561e0029b31321b1c38671d1057cab6815715a998a. 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/TCAGF2219165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cc1e0cac6ffb3a7babc4b8bf673a8870433fc4eb16e734034d1c4bdc291a08. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAGF2219167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cad1ef8b267dfcf62ce5444957206a582bf68d1cf864bc6fe291cddb87b8ff. 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/TCAGF2219188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d85cefc516ae16a9c15beb8050bbfb61ab95cad23d42be2bf12fd533580787. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGF2219196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e99bf91b5b2c2d8cc109d8b05797b342dc2f94367275031e29a30f83a5be6d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAGP2268652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe696244305f0a64ab05b3ec80bf8ab67686741e7ec7cd886c8f6d97a41b6c95e. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/TCAGP2268668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe975f54f715a79114b5b22334af76f96dc61fabf28c70a30339c67e4dda5c964. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGP2268704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868c479a82420d4657d003aef8d6455c98bd3d3ed744d1b0e5a389ec669c2366. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/TCAGP2268707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8318868ac28fa86db2e16206005ab0c3d66e163e7e7a95c65e67c7af115b5e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAGP2268734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8f4f38e94aeb9a7d0cdbe5de9af8d8dd2da0526b505ec8e2d28e78a0719f28. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCAGP2268744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7736cc66dbbe185d7cf372fed820aceeb86076f7b1401334d2fb883ffa06408. 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/TCAGP2268762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f3f821c419e6640da2cfcfab1384229e39b54d8e30200afe74580d360ec5da. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHY2471940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef706f92639ea36879044498cc5fa1c45a8b869f2773cb24acd40e093b0ea02d. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZHNB2597207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fefd3594b9b8c4188c6dfed6ce27936dbc66447d79b49e3f456ce7ed4adbec. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT65Z2597025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f825e9f222d88eb773fe5122ef3522518bd9d038a94e6284208f8b27db772f. 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/QM24S2300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3156c1dc77e62ac035febd28dd6ff0c42aedc3119520f9fe4dcf963d9b9fc563. 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/QZGXC2200188.