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 0x3c4fe8b86b992bae92c5af607a91fc3a6d5af552547689e5e14d642e5b271494. 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/7e039ee3-9985-467e-97cb-b7cfaf1d5feb.json and https://artists.proofprofile.net/proofs/artist/7e039ee3-9985-467e-97cb-b7cfaf1d5feb.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 0x0b444ab4a7ffe47d50f9a9caecbb87c7b0f23739375bdf3dc6b238cb07561d83. 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/BX8C52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f920d1daf49f7713207e2ac73df4bb43079737081eeecf789f82c5d81cbcc. 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/QZNWW2401961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676382a2027a6ab62f4588cdda6b510b79caaae418f1a5fcca841bcf48635db4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NL5MF2102478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9293c8c715108b243142bd1a0f92ee92e5e2d3b26f6332fdd4127a37d45dc97. 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/TCAHT2499962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582090fb7c98db6947413c651f712ba521eaab695567eb38dcee7a70fb4626a6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWFL2367846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aa5f72a81ac3a6ccf1499076cefda1c93946d0a2e3aa9f9189da0b2d66a1ae. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZWFQ2358239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f3983528ecaf368e8d3343a76b0f6c52baeb4a99b85d9cfc05db3c7b9e5e20. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFF2333856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb473451927db7b859eaf8d6f8563f505176e7a9a1ec19e8a496102851c0e311. 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/QZWFE2365735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91010d27084642594397e6688c3b28b6d751127a2b007cddf9c2fa8cdc98ca34. 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/QZTBE2311714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40706c6149440f329c70d6cab38485f2cb8282dd7ca66fa9f22203bf3d462be3. 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/UKXN22355510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecda5d01d4601c3ecc40c9ba0fa600e869f6015ee42516c39a2ed944287e0ed8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWS2234399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb815e44e7ef4784d8e9094ccb10c5a5d5e9e55fb02e174954d06bb3bacf864c4. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6G2275462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2859b51cc9b6a9047c25639945772394bc3b31ca44d66d3d1933a9e6587c4. 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/QZMZ92227233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87256f733096d6198ec35abb03de68297845df3ce5de0d14578ed9eaeb07eb31. 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/QZDA42270032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012713365a93702cbd1adb732cb6d3e5b03af878a6a3b01335fc7061501bb7c2. 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/GX53U2031790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67560f43a5f9cd316ff478f9bd642f430c71487b068fa12f9a1dca3b2ea0e913. 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/QZNWY2117038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1477b267d407120c07db5e066f662383f1cdbc8e04b3abbcd28de8f5b377b00. 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/QZNWX2190152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc42fd628015ee91c8ab841b52cda84f2a6a785bbf225702eb8e08a3fb86695. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ZZOPM2113678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba36853be3a56e9721ea47e3e3089ad4a3a5fd12546c24a8e8e74d99e8902a7. 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/UKXN22138284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01757e1319e998a233539384d7bd12c81df03430241913f160f863dfb196c5bd. 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/TCAFK2143850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aae43cd8f3b71ec4c3316d8fca0a7b7f1a52f1ab2ec9ac6fe45fa9fb84202b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZFZ52101506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c108a714c1f6088a8b29748c6d2253e77f735d5ac749e5fbcaf2204ffc7bb. 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/QZFZ22156538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44198cb9a7b73846ea53ace99bc168acdc648bf8fa8957e8ae67b28155e8c776. 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/QZK6H2088509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a05c63e901a52690c2bf8b1f139c4fbf4df6df00f472e5b30e25b306482ee8. 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/FR96X2085827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2de3cd7c5fffcdc9413e470314b2f1e723c7dab2ab48dc8dd7ae138734b2cf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES62073333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a28fe340f067f4a6f5a786da968c77723a2e41a76472e2d9f5eeffc2e01ba0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHNB1905080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c303e4baeefd30b449d45540a15d0ae95e127223d0fb6065c0dc3400dd1b7d6. 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/QZHN91988504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0234db49c87e9f4758fa1ecc7927e96b840c34e484c5a9ce44483e29276d56cc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GB2DY1900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694f63366a231d129d4a4886843453e52bb520a74006f31ac9bdcce4ded26dea. 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/GB2DY1900500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5540ef08b68575f6732529363326ec0295f535f47cc03c5824be4686d140dbd8. 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/QZFZ52067759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5478cac95a4740c3d69d9749e58a8f75c4e2737b34d81a75e880685e83e6c259. 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/QZFZ52050085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3920f0c742d33abbc38775e9d6c48ca255567bc26240a2506d862ca2d24965. 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/GB7TP1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5844247eda7a295cec8598d31b098c1ef54d2a293b1c53606cfda489615a1. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBMA22350186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509f65e62ce6dcfce79bc1c5d7b8451766a325c8997048bb8490e4597683d4e. 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/QZNWZ2456641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b444ab4a7ffe47d50f9a9caecbb87c7b0f23739375bdf3dc6b238cb07561d83. 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/BX8C52400005.