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 0xabfacf07810a5a0162df92145c2d2080d48e1d2bcaad12dce3c0b89c379785e3. 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/5465838b-b22a-4640-a8b8-90f999516cf3.json and https://artists.proofprofile.net/proofs/artist/5465838b-b22a-4640-a8b8-90f999516cf3.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 0x6d15426eda336770e6b5e516d8632a37a873cb2bd2ddaa232c2eab1e9f8c26c9. 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/QZFZ22092404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc85d7c66e11505ce9b162ddb0a2bd19a584feb3ebf05ed7aec2d715c2f5d4. 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/QZFZ22092405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6298feb77021c902e6d17b12d3ce9602f489ee5164007aefbe8d4d15709d913a. 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/QZFZ22092406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efe0f713f534e1f892b2b30ef6f003aee5f17cef52bbf603ec4ab990eb79af3. 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/QZFZ22092407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc864b5b52a83888375ea42cf5d0645395346b3d6de5f85a2d6e5b97ce453185. 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/QZFZ22092408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56173b6e08164da5c61420141250d6af540891dcd262c39ab594404d9f778a2. 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/QZFZ22092409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbecb1afac593126be6349e4ad1946a8fd88479f28f65e2bee73f8229b104a22. 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/QZFZ22092410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f84460e0d9c257a7f877b4acef2c9dd756e0ffe0dad7aec8e1089e39121295e. 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/QZFZ22092411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb0d9e332041d183c5020f842c2b06cf70168913c21ddab2ed21475279bec66. 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/QZFZ22092412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb156061ca8adcdb5c0335997f9f7446c3485c491a9369efc7d78a964d7d61952. 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/QZFZ22092413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f0ab5753ab498229c677c98220772a0295e62b8a652c1211c6877aef38062f. 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/QZFZ22092414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2960d55628bbc8ab714cf00b1338974a51d6484d7b97383a62a3383a27cc13. 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/QZFZ22092415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa836671d691e4cc5b740bf829e49ebead8660491f979bc634f87d312d4c332b7. 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/CI2DY2100427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88405687fa03f87d547eedcb9101bfa5dee3044123e6ce02f64d2aef58595cc8. 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/CI2DY2100428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88cefdd747903ae02c7b7bb77d261cbf3e83e05aaf96b9e7a2feb1b3a2e99b. 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/CI2DY2100429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089b91945ec3893d06e74e96460dc1db56d2e03a3acbac4fb9e61ac551e1c363. 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/CI2DY2100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1804e7106fd603279b92e0e5015891d44cf9169aaa34545847929b04344ebbcc. 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/CI2DY2100431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b41e9751de5ce7e5d941e20410d1f9cb010cc9fdeb19c07de5e9080e42ccd5a. 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/CI2DY2100432.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73df19925ce170b0bcd3129b52e7c7e9ba6432da60768102f52542ddc9e6c35. 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/CI2DY2100455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089171db64072766c4ab9df7d3319b1680484fdcdd5366f1908a49f67a69e61f. 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/FR9W12210860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43520e1d436400b7db0fd17277fdc2f09040220a3b0eda84bce6090d6892fd. 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/FR9W12210861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a40140d533f20a1cfb536f7836ef8b7efd455dcdedeaaf4e35b415caee515bf. 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/FR9W12210867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d54a625b921da2458f53cdfcd05eb810086a62ddc7c1d361b2681d8af197d23. 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/FR9W12136320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1121d3f3cc44cfcb7a220218525b81d06f14786e94b9a643ea6412133288bd5. 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/FR9W12210869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2a3fd61aabfe9d7400c79b4197240c20946c29d6b036950fa4162c3b8f9f84. 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/FR9W12210870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929dc8f270993a8a44c6a1c3e952c37b043e65bf8d37420ccf523cb599f074af. 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/QM4TX1733104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f988b9f27ac56219843bc549c00a29ff1db300a94aca1c86f193d583adb7e. 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/ISRCF9200012.