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 0xcb316de0333c31d3640b8bb92b299880a9c82acae32d823cfa95a304674c0fd3. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/386bc2fa-611d-48a5-ae26-0f8048726179.json and https://artists.proofprofile.net/proofs/artist/386bc2fa-611d-48a5-ae26-0f8048726179.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 0x6a3e5acba7c359146a753d62c8a30f6dd0b62c25aa4a7645f4543f14e368f8b3. 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/GX3HH2451823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8a66f1d15627bc9020cfeac0e24a216b6bf771fe87f44bc700c116257988cc. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GX8LE2418228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190c229000d16ec6baa399f25155f23cb42f2615ba375d7509877b299ad90a07. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GX8LE2455456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e77dd1edb0531c1c80ec923388c0c4d17cdd28127f000b3e5c0b708214e9c10. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GX8LE2438005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c5ecbc8a7996a30d38ac5db7bd7bd67bf74f44039d8402e5d5b6ce1829fd90. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GX8LE2488855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36084b7d18543c84e3ba80db91965670aea915aea1f733cf01443bcfcdbae51. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GX8LE2471787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe205ec838c98961c97b94cb4ffecc13c47f192a44e6538f67b61728523580d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GX8LE2407450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a7ced8155abca604df333f820948e764a30ed9d7e3c53ddb0058a60efa24bc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2482468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc6aa7bb5283c18e186fd19fa0e88d7e50e31b928db2e93ecac78776f4e34de. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2485501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b623f8dfa8f137aef33af1f4ae440d0ab79e62a26c7ca4518f780dd8b782a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2446986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112d9b1067d814fa1976205b9fd17f324924cf9ec1faad93ba12a5bee946daaf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2421117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe687c2b270d7893898ad5e5fb0aa6b56b7bdf62f2b8157a3aa6dd3d08350cc4c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2446129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2480c9cf76e664cdd5b88e5b61ee8bc7c9eefa57a121893a3086d14557f88b1e. 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/GX8LE2411340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea266cf27b5e795686d9eb1fc21beb71c65230acf533dbac20e87f520ac9f0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2442301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb7669aaed803a5505b15e6ed90376cb96db92fc6facce0be207a2568be4e0c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2424958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eee42dfc2521861af5a49f55f181cd5c8e37fb791a760b7d2267938aabe42be. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GX8LE2462486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c57a7076c07638e693419b71cbbd541eb0e13cb64cfae87f858d142f7881113. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2441465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc4ba2d0951694525c61c09ac4522de570e7510e9a3aba1a77d059126bb067. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2486880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c11ae010308cb742646b7d650c852929ff930afbfed5d6be260d13a69a2475. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2441103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae51e2e51d525da64f7a95bd1c953964e458b58e5f8142a688044c573c7a2869. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LE2405441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fa987df229a7188607149a3c6e7ac07a18b2f651efdefff98607172ab5475f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GX8KD2412369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37e5210cf6872d4134ebeaf444998b70971f5e110ca11fded360351aa56dbf5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2423907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3059ca4a8482e28f5d5e7b1f0653a797b8158486e320cf06d39323862a6f9aa1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2467020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3e5f19e823888071870bdebbd5c04c1ae3873efd76d58e15f7e77d396404b. 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/GX89G2422133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052e789cc6ef1aa6670e742e1ed5fe429bb61d7311a00319cec5767672d17c5f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GX89G2424311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836c1dd9abc0d2a9ef1c4a14863155315e22c2807fe94ec43f4bb8d5ef82ae15. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2445708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4b4cd3dde127db01095c1deb070713aa54bebcbd3bd8e1629a0d6d35392bac. 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/GX89G2430721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5cb8e646e7689760ad6d5e942878dd976c649482188e5ca6d0009432f2f83d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2493799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201275ceb77e3d303508e7247f3f0fa8b8a27521685e5ebb7295b00f43eb0dd3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2429089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517b4b0b9e1135f964ad09aa14aba893c7a489383def85ceedb1c462a02be5ff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2442568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15886350a37b6d8127820b8c3228b9351d1d5ded364a9ff0f47a2532f72ecc8f. 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/GX3HH2464243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0494e53e13e302b2c12638aa7cf52bb21224b64420daa1c3181e31349128980c. 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/GX3HH2400950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe502bfe924ef6b3aad29cec3f05e9b9ab751f0ade113f942b285ead2413da0aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2489156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8122a2f3c5e4e36d2083fe918c34da2116585751c2d2dac851e8aab54c0397. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2476860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70ebf48eb554e987034d70e543734da994265674560021adc1dad5da61752ab. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GX38U2367717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e414a2314e7cb27ebcba0c7b3fbffeaf347cdd222ee53b0f2854dabd9c2448. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2355540.