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 0x19d4567dc663fe862360b2b9f92656ec268bf00d36a8a7d2873846a0595ad201. 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/f7a5f112-0f31-4e35-83a7-b118f6629fc2.json and https://artists.proofprofile.net/proofs/artist/f7a5f112-0f31-4e35-83a7-b118f6629fc2.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 0x4295e6826494e9eb32f38c61c5c562bacca70f71ba84c86f8b52ad53ca96d2bb. 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/GBWUL2430224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98a2e0e32e7dba4bd18958b4733e1046c46cbacfe6a292f77b569a719db2b50. 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/GBWUL2430242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bb0f3d68e2cdd99fee722ff6bcdf4133265fcb69d5dcef1b2cda55ad6deb90. 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/US83Z2468247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f35ae0e770943a3707be6c68dd3d943dd3eb8cc740a9e9f55b560c07c0e0b9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ITLCJ2100607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668d413a1fea206839b472bb08856ed407cc8f44d10e15e84cc34d47d1515792. 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/USNRS2443389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f256a81a2f7370f486024e2a968c37e34874b7d8307d1bfafa0b42d7114add. 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/DEL712410062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e8742b7525b8b306c00b012021daa61c754a993f7ecf11ffea73f0ee1b29ea. 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/DEL712410063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467e92a78cc7a477335f4910ef457431451c2faa6446f80eac3f5485afc63182. 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/DGA0Q2374471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25475c4f3a86210fc30a933c5b8cce502234462b775b75ee470cd4164e36a43. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0Q2374472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ffa8c9509320366755b50fef4f460bbe05f107d7fd05fb1b128623d7b877e. 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/ITYEB2300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ded6772c116036f2e7744e5f0bf1e609c3aa058d22512434c9ad600754fd6. 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/ITYEB2300548.
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 0x71c3bc14253c5878138521d4f7c70e0cd33935b11556861b7221b12ad40ea2bb. 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/UKLVE2301412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611d3bc789c981ffdbe4c21c7c36fbd61917b08051842139da5bb85eef639c54. 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/UKLVE2301413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8093ab22f93a2dc0a16c8640790f192f8d12eb6c452ce89235ef280d4429c200. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF012300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce60e1451e8624ca0e7e2f11059d8efb8216e8d0271fd686f23bc7bdd42e3f17. 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/DEU672300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9351441eb1a76acdb3094b3fc3eb77b1fc151fe30f70811277e2ffe8e2e98493. 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/ITLCJ2100338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d50e48e0e10cc897d73b919e8c46bc8371c3e6bf3f328fc12bd8d9cfd3ba137. 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/ITYEB2200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797b8c0884b2994f8335928232a5fbdda40c52fb85fa09f06ebe47bcd48e478. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2268027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7a0faf62aa8923edad5954b4e26bafc081a57a724d378e8da301e40c5de1f0. 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/DEU672200890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6f1a5fcdf8a721a0322eea4a7d5561c42c8945ebb784684e8a22654d86516f. 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/FRX202286774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabccc3f497f5f5e3428704e318557e4eb2f7b18e5a92d1734d65b33892747ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX202286773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9a5b8e07115050144b987b5e1b9ef0ebb9c2d40bf8c4ff3dac508b0f6c2a7. 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/US83Z2215700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6bc2f4b9abafd826ee66805a1488fb36797459fa67009a67c5499bb2a18d46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DET752200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025b3594718d521d08f0ba4d674984ef8d235adcd8273bddb1a7470304767440. 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/DEBE72200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3670a0584454a0d9af7e4e1bfc182dba9750bfdcf5870e501d7f5638b37c789a. 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/MXF012100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f09254f3ce8933336d5d26cc942c799d5f6506b36dedc2471d3748e1e085e8. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:31:52Z), 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/MXF012100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58d0377e0ee7c8f90fe11f4c516ff85ffba53697f4231340ed53f428a0b7cb8. 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/DEU672100853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ddd940d5c6eee13a2e18994658bd2428a5f9801d07bdff15208e94a8020999. 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/QMBZ92005042.