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 0xd66efa1733c9c69cafd83579a000298f437e3ab952332278cfb242479d93efd0. 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/54808ce4-2fa1-4b34-9bbe-ec1d1f0c928c.json and https://artists.proofprofile.net/proofs/artist/54808ce4-2fa1-4b34-9bbe-ec1d1f0c928c.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 0x7f75ef000c24946df046d8c49098e42750b72d15471bd318aa74ad4838f15f7b. 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/FXQ892300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976973879357e3969230226ff6c3f496655ab0a619d4f5682d0aa30c167cbb12. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FXQ892300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8794cba1ba2e0a44b9aa31e42a0cfff73e2c6d7f1c24a9643d55000b0d217c70. 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/FXQ892300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e8fcc562bc9daabaf51b8e5c23d517042c8946f1bbbb064348133ffa4ed29. 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/FXQ892300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b93b3f9900f46260f3019ae20e5095547ab67902b62196825588bc7397b09. 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/FXQ892300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa636d8856698f5c94cdcaa61842e30d50c023250b169058035bf1690a6340f7c. 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/FXQ892300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27852cc16b1bc5bd6914641aac3433db14938e520e46a16a70dffb208c2db086. 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/FXQ892200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32a9fa3c7e8fb8fc2c11b3760fb88e9c32fc528f51da84d4288335d1b9d7329. 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/FXQ892100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff21bdbfc1bbda959ea45a8b513df10253948942f7d766ed885e5b640f4f6f1. 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/FR9W12110221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc732e5647f9fb1f487636d28de0d90ffdc01bae6fff2f1926dfab66dbf7ce587. 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/FR9W12102152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3902413632f2840657c52079e90c46bfa7a57a5762a8bea564e04a239623f86. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12030945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6ef0fd404b2d9b31e4c212a12f44d00e952f4bc30cc00d60ecdf188443680a. 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/FR9W12025577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab7d4482825431a32235c588152e8e06e0477f28d0bf8a1c32481f22d558717. 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/FR9W12018992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7592d5b47c19b8b05327c205258618e2db7353619f1cda98dc0c64ccf6de81ce. 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/FR9W12013589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b75f17a3c7f8a4981206f2dae1ba3cd3b5049cc101d3b1ba767a50ec2837a52. 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/CA5KR1981989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf999917a922f64cabe3a720751f2e264b6879e371e63b6e6094c8f0a6908bdc. 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/GBSMU6377997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde16cfd3df08b9a0410e954b1949aeeab3d929f8d3b9d2f1fa47460d7e3e8150. 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/DEAX11900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bf397ef855c608d23baf378480288c7ace940a092e53992444e47dd8902937. 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/GBSMU5839239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87676dccad8bd52f92c80814802b1bdc64f4308b9879fd16198d3ee65e686928. 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/QZ22B1806783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1573e5eead141f431d371ed2c0e610697b5f677a14ec30850da9fa9aaef58b1. 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/FXQ892400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f0b210d1743ad7a82f12d435503d1a95b3169f0773d42e23b13dd73d6773e7. 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/FXQ892400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a410364294b2c4359e9bd99dfdb7b69536aaefb7801435c475c1b21bcd3ffb8. 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/FXQ892500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ab43cbb122372766511afba5fa4cb99e732f6aebf4126f1e21546116e55ad2. 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/FXQ892500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d03cf4f9f9dae741f4c210f59a281bad5834dce4cfc5afc559d6f5313c30b8. 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/NLZ541900505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da712a95ed2ff42011e94256dc5662f140d24d2effd2324e8598f48786ca49. 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/NLZ541900506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9009e6b8ff2ef685f0d50814d9b61d0e53f99b1f712bc6d528391b56fdeff63c. 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/NLZ541900508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39366539dd4b5219abad96f58dd095bcf36bcbc05b22d1ab31b668b3891ed860. 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/NLZ541900509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbad4241d8bf666016fc23dfb5a1e54dddd65e8a1e978fa7cdfd37cfad338a4. 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/FR9W12011569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa57c72c22216a67309b3c1de0efb99ea14a08d5ce6610e03c0b88dbb80419a. 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/NLV5Q1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1eff53526b7c4bccd0260dc3fc9ed2a980cb6c3ba2bdc1c74fd1b944923b7. 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/NLV5Q1800005.