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 0x748c86393cba7863792aa60eaa573214eafc8dfdeb1df57db465bacd53b13d7c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cc45552-08e8-4555-8c1b-cffd1d38955c.json and https://artists.proofprofile.net/proofs/artist/4cc45552-08e8-4555-8c1b-cffd1d38955c.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 0xa5b71c013ee1845a58b16ff285827196aafc1565dfbead1bba60485d04fea25c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:39Z), 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/QZES92067813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d711ddb34638ef6de9fc477e0bf453748fe3bd502a8e1771311b29746ddb031. 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/GBLV62030028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6765ebc3039784ddbb9212ed35fb1c81512a740250855ea2488f5403944b670c. 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/QZMEM2032415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a2cfb6bcdb3922a1ba071df7d45c909e246694ab6d7b0387d3a843feec32d. 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/QZMEM2032417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f30cfe55186cb6a3d9403f6c52375c17b9d4e39eb9b5a8b3f06a1b1b4b5241. 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/QZMEM2032418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d56d80bec8326f959eaf5010968f3609ac461602535861c20460dc6ca0fa17. 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/QZFZ41994999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe9c59ab86d677685bb401b3a0d30a8c8cb1d922085fc03e998dab673e06c5f. 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/QM24S1907704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f11c79c1cf11b9ef8bf0149c5deb18d659d37c10f07ba6f170e552802e2643f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ4JJ1929660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1396bef6429f6c3f22e906b537e36c2aa454ef1fa0e86ef3754f372c7ffe74b7. 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/QZES71811562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96266d533cc4b2b90e589c15adf553925807107287f77548b4f0e2f302b1b23. 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/USANG2079077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f4c1d62f0b29ff8a44996695740e16433b27fd580c46641e622fac7a06be3f. 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/USANG2079072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cc6c4a9fc8c79ac051f7937e654e67fa7e8a3f5842f796fbd117cdc9121231. 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/USANG2079046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cc82bb9ba7700a5f410765b59e0a40a36ce15d446ba78b4a84af2eb14b7366. 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/USANG2079079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1876e3110f8172b8159ecc03e35aa8c35b1b22470b7dc287c3d3f9fa62e588. 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/USANG2079081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445cb096c979b99a9b833655365005805e53ec992d6743ed200e92040d35517d. 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/USANG2079084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb87570d19f859852500175a98220f505819ee0f80cfc474ae2fe57ae3cf760. 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/USANG2049806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cca85661fc1dc3bc981c959e490376e35edb6c0cb10ecb6fa0d37a527fd38e. 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/USANG2044488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a31983ca7f56a89cd2c78f1d336c90605da910fef398d326b43ebad509431. 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/QZHN91909946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78755f9c4fb4e8a5fced003a0c8d8f6dcd3b128b1c2c6adc1077c3642390921d. 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/QZHN91909948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01c48aa85e1415f0513684e484dfe54b645a4bbe694ab2de56df3b0d76ee9ed. 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/QZHN91909949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556383fb8a8fdcb482bdb986e7412afb3eb888108b5d835de75d20e38675d88c. 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/QZHN91909950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29f08231661643be00d9331b3bb263daf70529f46e092eaf50aaa6943d0ec03. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:11Z), 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/QZHN91909952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2ca99482761c753cea0f2557000f3f6419080a0c7ad23c63df74b06442cdaa. 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/USANG2024947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ba4656d2c465f1666fc8f280d7ec38bb5b14d3ced79a44c06622bcab4f0cdd. 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/QM3DF2129410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22ddb824da4598e188e7c9f63dccb6263ab82ca10800efe28a1830cdbb9810. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:50:41Z), 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/QM3DF2129417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506777d28ef0d74d31a94189f2064acfbe5a51e304e91f95c9e1914e320bd777. 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/USUG12100666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713a71e75c3f9018dce0697317d389e1c7815efa97ca90444115f231a58a9d65. 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/QZHN91911242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d3b6e323a6aac69abc22cf413f807b6cfd1c1e5877ded4a83a41cf923f3149. 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/US3DF2126004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe9c59ab86d677685bb401b3a0d30a8c8cb1d922085fc03e998dab673e06c5f. 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/QM24S1907704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f11c79c1cf11b9ef8bf0149c5deb18d659d37c10f07ba6f170e552802e2643f. 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/QZ4JJ1929660.