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 0x78e043e911cd2d433f0dcac9b8c32e6fb430b5fbd51fff411513bac64bc56dcd. 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/a205a1a2-84cb-43db-846d-4edeab0a1199.json and https://artists.proofprofile.net/proofs/artist/a205a1a2-84cb-43db-846d-4edeab0a1199.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 0xc9796a43c41490db1d226efdde622407c4980cb5c5c7e615f9cc8c2309feb891. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52022497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726184968609484defd5dcaf495ffdeac36643fd93df4307064dd2b6db9c40e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52022498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287ebfb2d33f6cb74540443c0c18bd06afc57807dcab33c6e5a9539a446cf436. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN52022499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae319f39c1ef0af497c57073880e03ebdaa5428c424972e43e133f343908c47c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52022500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec266947a8959f0c70c8674cf9a93dd8480259806afe981a057aaca01f9aa9dd. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:12:30Z), 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/QZES82026516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12be5794ad7c5acd1f3d4234d9a831114502d4b962fa4f746bcdcd6e63ee6ac2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN52022503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e47650ae543b658f7361474f1c4eaa50e0dfcc493511432b9757b39b575626. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHN52022501.
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 0x0e4c3d9ea7c9be9d8de5aaf441f86a4a1f4b706c7e1045ef36824c829aea7886. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN52022502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a7cfb42d59b078e0939aa33e66a2b74afa259864fddd6022222051952cf46c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2375292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece004ab9e51015282c37edf4958f4b7116224265ad631e8cbf3a01ec9f0509. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZVEM2343192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae024b8da2658ace62d81b6ed42388fce08687e166fe4cb3cda4fb44dd8ac099. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZVEM2343195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a4e5edcab4ac078ec42e809dbfff2d78046d39d5d71a6bbf11e56d87619cc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:08:12Z), 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/QZVEM2343191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d154b80762d6705f2058026695cf34aa56b2414d4e355f6da80584f8fbc73b0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZVEM2343193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba2ba0d78e61f0efacebc32635983c136111713f0f19537e1348a9e61d97fb0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZVEM2343194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e933eaa41287c84acf7b0b67f241066949bb4fe1ef6306705d52cbca92820. 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/QM24S2300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960259bfa6c460ed900c894bec89d6da2b6d34b2ff1ed67ee19dcaf7962e6cb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM24S2206770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6836b94f857460318f1871f5cfa26cdacc013a63adb3129e8b705fb8f1e76e. 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/QM24S2204308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacdcf19ebaa05be10623124f8080e7c3ba86d006df30b7251c0e4d35d0258ce. 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/QM24S2202884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1debc3b968109e0524f55b31e77feb893b87320f7565b96e7d1ac25e81e96ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN42285077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57ea9032dbeef4cab24e897221670d382638b35cc71f21c269759b04fed2f87. 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/QZES62243874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965f0fa884892f7cb7a34c07b39622a579d27fb53f8338a802a2cc95771cf123. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES52202470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c138a05f3a06e9f2543e90ff5d861765040c45bc37c708e97636f412416d30. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72267166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb16f91737fb11f3f5432227ecc1581446211992d2e03b06099a00dc082fa78. 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/QZFYX2206127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe16ff7ec3f937b0dd382634f8dc9220d885ba78379daaf43fe36ac12c95ea1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZMEN2118259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bbd8ef2ee0226179331cb2350c63ae70d23f953199a3f7f766d34e1ba3970e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6M2185441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f78cf3fb52158ee92d5cef9d97364a279971a216596487effcfc3d5262d7df. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6P2134261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eda797c3950a053229533b41286208ae1c4d1ce212374aa427177dc17e4666. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2114284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59635f4e52564981bf1db36419fded39daff2e29685057e4a28391a83b660f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2114285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2ad9d8c8e7e3effdbd0272ff5a3fc4096a3fa1847f6da7227bf373555c4625. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZHNA2114286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9d06c2b0e6877b72e69d4d4b5f7df577200db0714593b875a1c500f7cd8e24. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52179452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed48cdb21ee9afe67149d52dbc8e0a68dc70d70a1ae4d758cc0861b40e2c70. 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/QZHN32123154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c4fd801c49a0fda219b175c91363c992d639e23b5231de0e6a20704fdea08. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA82183783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c2f123b62de7a2906eca15f4225b7b767eac571cf41cd442639133d8f1bd3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZFYY2123426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea6e974e736ea3ceb2800b9d4292cfdeedf6ee07dfbe021abb8104f4a524ea1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFYY2123429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb218cd9f843d562b27ef1c400c759edc47f9385d195f7e69d4c55612b6b2532. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZFYY2123431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337de1ad53557c80fa84b1922375af4ed759f64e1ae00462d772b73d66e19c00. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZFYY2123427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829d58c7bb3439d8abd710e006faf2c6ae9ba4748a1a81a0cebeb3f654832f17. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZFYY2123428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6d3dc465555ec98377c56c888d9e7f1c6c1c299cc66abc3d29c2862b7b0d5d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZFYY2123430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86895e74dc9de15851b3573de107ce9bb484b2f82653cd7b580bb7c6e9503499. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWV2004495.