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 0xd58e3c6bb66a391b1e68cf4178376ab0088aff6f87e91cbcb5aa2eba2d934047. 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/c3d8766d-624f-467e-82c3-0dc0c6a4d199.json and https://artists.proofprofile.net/proofs/artist/c3d8766d-624f-467e-82c3-0dc0c6a4d199.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 0xe359f3149909f4e1c722c9840842d0171ae22dc8d727656de69eedffce459e64. 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/QZHN72183598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cc7775de8e979a38ad62bfc2ba503e41ac6d9fcfd799922c9357f6409a831b. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZHN72183601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc175b334ae40b6806369793cb72a28aa30f8639607c5165affbdd564ea27c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWV2150168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a2d9f959c53c66d28e6f3c6aae702af36ae48093bce215a76df2735fa8796. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWV2150169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7418cfa30aef7bdee1ade45413bc5ab2d70c1da02c01988d2d9d8f3059cda6f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:29:12Z), 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/QZNWV2150170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd1a6aa50938f77bb54a502f6e39854d9c1c29397eeced6c968403eb6ac8fb6. 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/QZNWZ2267600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9a59c83ce2382d6e39db2362c217a2d6c298bb547fd39d6d13b2d3aeeb560c. 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/QZNWZ2267601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b93c6d90b4615c8ec8cbf96cbef67b1d69bd17b5d745b50ca8c80368dd6046. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWZ2267602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2a1ef2c4351a6d15fcfd0449a80558b41e8763e1db5fa9809ef28c860dec21. 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/QZNWZ2267603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d19b1ca1eb3a7760e3d6247d313bec2636ece72573465df1becff751bd673f. 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/QZNWZ2267604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed4320682fb8fce1db04a248e8006cca4952df9d1ba9f235ad1d81356fcccbc. 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/QZNWZ2267606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d9f930d5b95b1ef1373ec33be63b36846c26706668fffdf0e9b91a8ce51eea. 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/QZNWZ2267607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c29aed37431d77d14930f938d7ae09cebfb2b42a54e1c6c104c09844a6dcb4d. 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/QZTAT2342125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f27b564d6f931046d5e82f134b0293e3f255ec0226b09312f0d2d933c388eac. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:39:19Z), 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/QZTAT2342126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dfd82d428b198584d7dbddeba87e57d29b0a70cfacdc47bc103101ffb3016b. 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/QZK6L2485006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739027ff1eab0b72371da3edd62b209bd25af50751d542472c51979403d218e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6L2485007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06359b88f2719db55a15ca8bac59c57b6aa1d1944283c9460ff2b501da1ecaee. 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/ZB6R22400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb400c471f87a68d86d53de320f0153248b11ba7759b024dbff1b7c68c6f5d671. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ZB6R22400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab999801cf4c446c32484bd7c9cc71f8f2cc02b998aefb440caa904dcea61a6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ZB6R22400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2981954944790fc0e4a5e8c5d427b345b3fc895f337f799aa99d0fc17d3690fc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ZB6R22400016.
Ngeke (The Healers Private School Piano Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb115e6f0a8bd3dbfa0f017605a9a59d704fde6be116d0c106709d5a29d783db9. 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/ZB6R22400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6d38514f5e7009ce77cc13e608d3ca3a76c3dd475d0ba04f81bdcb248cb688. 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/ZB6R22400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0621f9e0f4ff7aa64650c7b6270883b4a755c69747f5824826554c0db658b9c4. 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/ZB6R22400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63867f8ca75dcf3feae0a0f52d653edf05921cb62a344d8896d69f6d63647693. 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/ZB6R22400020.
Amanxeba (Yogilocco & Tukz Ancestral Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf846ba5382218f2afa3a6c30f7673a9199d50cc2a7797846e2fdc8484831252a. 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/ZB6R22400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bf6bdb1f02b29a65918988fc3061aaaf247debbdd0913955a9f2bd5406a9ee. 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/ZB6R22400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc8b681e1b019a6d97d5afa875e6a4d08eb00b2e0d91bd8c070497b59c6440d. 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/ZB6R22400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e26ae3ef7c356c9eb474ea9ce88ea9d3d8d3210a22c51ef2a7e65a85e7361. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZB6R22500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a548c2d08f9a01ee960dec6836e0ec4a90ee083b331ed13b48e92a5f1380a. 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/QZDA42261612.