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 0x42b852c2dfc519eb6cafec6dc9baa9e3f003172c054baee97160f737b6ac3493. 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/97d69047-5d57-4ca0-8f07-8d10a2084526.json and https://artists.proofprofile.net/proofs/artist/97d69047-5d57-4ca0-8f07-8d10a2084526.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 0x79daded0a9399de89912c8729cd2fd3da131dd3ec63a53a6e0e58e8c2581fccf. 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/GBKQU1830217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcea4bef596ac08c855f63106be3731c95ee22b4d0d6d98146afe3b72725f1f. 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/ZAUM71900944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6482eca441827895f1450756c2882dff576b9af085838f46c1342630985828fd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMER2071447.
We Love Afro Brotherz Mixtape (Episode One) [Mixed By Afro Brotherz]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f54e739138e1758996b16443176826e64f31ed9f58ec832168fa72dfe8a955. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ62192177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaadb218095e1647e694ac67808fa883926ea39efe6bff033dbd97b379eeb37. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/UKVJF2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb89f61cce28975337f0c25480737dc77465fd9328823dcf0a99004cc5b013c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWX2111685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a5f2eb8b823c2420e829cf64ade154497c356a558401bdb1f01285cb85051a. 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/QZNWX2114344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e520c6076293eebf0c15175c920bb772848630df425b5468a60a342aedaedd9. 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/QZHN82214866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496edbdd64c5f506e500ea7050f210334f4072c6ddb5516e7b7cd2cd3e39ccdd. 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/QZTAU2287234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f80f061c95e986e08b5a3aa83d0281a0c6cd741889f5b25f4054bb6f18cb71. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWV2305347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a83071bcc47822f2ee744757782535f370bbdfaa04965d9e2d6e7e486174fd6. 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/DEBE72100877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d120c9c9194825e6cd39eba144e768d7d6d79bc87365f6039975a40c498036f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ZAUM72100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee3803e494cfbfc6ddc334c2daa7438e82e38728959e12d2a4baedad1c25835. 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/ZAUM72100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0d79af9ad2bf62bfd244140e41ad1060b1041ec77888bd2cabc2b39668a1aa. 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/ZAUM71901093.