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 0x1fb544dadcc3a2dd0ba4d2596883bd02b602a2c912889db2bff5e4bbb12f067f. 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/9ea5bee8-7fff-45f1-863c-ea4e3735751e.json and https://artists.proofprofile.net/proofs/artist/9ea5bee8-7fff-45f1-863c-ea4e3735751e.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 0xcb5f6085ec1bf77bd85cdf27e20158799ba0bfa466d5e3cc87431ef65f177da2. 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/GXF9Q2531707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2400b279e11e6fc4e7fba7b96c77efe9ea4d844b0af1d9fbaebff632d104976. 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/GXF9Q2531708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff72341a679756f0146a9d15f86b2d40d6e3b4eb6b7c5f9152502c25d079706. 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/GXF9Q2531709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb181ba5f8488fd5e8b30e90984df1bc27a7be7084cea04fe1006c65572f6d542. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:25:33Z), 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/GXF9Q2531710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da7c0402c0f4f9aa1d5fff6470b4751c9fe4d5e16edf16fa5ffc583c6d0f9fc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXF9Q2531711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cd58001feef13db251858df7feecab10128f0bf8b4a45e7bd95a33d80361e4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXF9Q2531712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3be1f0b5f33959a447531d00109fb78d8a56fa40abdf62dfbd63ca0179c0b7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GXF9Q2531714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b38f837f20b0af13b524b9f509f89575b41e26237346f15e4e750ed60015654. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXF9Q2531716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee71fe86e0d5de43ceb346524fc2022ec0e71ca46271ccfab279cf05394925a9. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/GXF9Q2592340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4adc16b656fd601178dc278e94997d647476271c9b5017af082cb591840432. 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/GXF9Q2592341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbbd472e19850b4f22efceb444ee5d8e286acaffc06f903e9ce61180997cb41. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXF9Q2592342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ed59afff21ce7d59d8878adfb5c2b7199dd6ce92b3a0ea411e5293e9e2c0c7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXF9Q2592343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e63e9fcb733150e555c07b92e902c83b381e9a595af883e2045c14928afdfee. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXF9Q2592344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33fcf73307aff8c8fc2ac69cd15e717e856443616880edeea9b0c6f7e4d6c82. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXF9Q2592345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b732e9aa6ede51b30f31e28c48b144f1919a9ba39116ec43b439e673f39a497. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXF9Q2592352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf86e64289f8274291a1147d6d66e629f85201de06eb39c4dd1f847955ca399. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXF9Q2592353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cd00bc5ba6dabfba8d1697a4fd68481f4690baef71511e1b84d534b24f9932. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T13:00:32Z), 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/GXF9Q2592354.