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 0x39466bcfe0202fd70a60ab906febb0db14a7ec4d67e3ddc41923285698e172f6. 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/24f3d7e7-ca81-4927-87f7-e536e49c8081.json and https://artists.proofprofile.net/proofs/artist/24f3d7e7-ca81-4927-87f7-e536e49c8081.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 0x22bd9422d19affd2504a854dbc269e7b2f926a60a877e647d3c92bf5a49fe145. 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/QM4TW2254554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cb4c257cbccddac49aea26342544bacb7ca6d871d9e6aff073167dcd796ef1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM4TW2254518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb028664983dba9b7045087f99c4767a495134448aea2605e8da34f3d040410be. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM4TW2254540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b474e713c71a7f9313863ec13e4e45b7f23231c4e806bfe7059be41ad8d5ab. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QM4TW2254515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d908ffc789af7d69cab6de4727f906e532a64b309aca243041055e6a81bcad. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QM4TW2254499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90860c0d06c4cd2544cf581cdebed8eb3dd9bd732e0c73c0bb8720746a2fc7e. 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/ES71G2505291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03ac62cec8e4a07d1fedca0017b352f2a22f34786ebb99f0b3eda42b97af50. 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/ES71G2504976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34e5c09d0a4be8d63f7ca83963f9ab5a9ec9ad52459718fc1c5c21bf3c3d3f9. 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/ES71G2434104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f3fe4c30eb90a7bf200ec4a270a080a7f4eb590352e5e939b3f426133602b7. 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/QM6P42567752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f15cb3e20aa4936bd141a58a587d7dfca402768a00b83dce1cf5f9e60316c21. 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/ES71G2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0f81b63ff98193cda7fedd67c7fb0bb070b5aea09c1f8dc362ae6ef0807338. 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/ES71G2426435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f94859910f3d50a8d80d9f8e0f54b2924df4bc9bb7603306d753d98f0be3777. 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/ES71G2421043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8392611214853e2b448d906a637aefdc8647df8dbcf22345e90dc98c97e93. 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/ES71G2420784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7855946387d2e21a4d7bbfb0fc51256d5a8f1251088715e2a6e769e28859a95. 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/ES71G2420336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b13eb9dc8be3b19e0840e50c6d3582426a9b06780e3440e7cba8114cd321778. 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/ES71G2402530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a17e9052bb77ee08a54b57eaea0c7c104abb8a789a47a1d0838b9c8391795e6. 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/ES71G2334941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a5e43983fe089c2cabdeb0985a037e6d33b342b706ae2647fb4a9fd4934425. 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/ES71G2318881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fb05a5d43192f5f2f0171fc3978d200a0b932664a078ecf721ebb270e931e8. 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/ES71G2247777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f9a4feb3a839e81d80169033ee418dd913ec2ba153caf8cb4f85e5f3bf67eb. 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/ES71G2229679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a775b592a0a1aec0a24e05df00357814d1ca6f1169e79829f7591fec83ce90. 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/ES71G2220725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b2e4a7a2213107f3df58a3673ad7d2f69d8909da3ffa145a91a9de78d573f7. 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/ES71G2133680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0488bc627850e59bceca7e10145549487e0cebec82c8a8e6bfa8cf87376743bb. 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/ITF252100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdc469a92280e88fb244be4f7cc4ec56ef5ff8a80be2c70379449e8b575e293. 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/ES71G2117044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ad2739cd67a26a49c2998eee50cc88dbfce7324b1933cd4b1eb225f6596caf. 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/ES71G2107063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef685f091cc9680a8504ec83a7be7f09824f16e83e8ee4384689dbd9e5d655. 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/ES71G2425655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007f5bb982a97fc1d85a2ab1e6e97749ecd28b733f80ce544c10f05e78b3c55b. 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/ES71G2051870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47603805b63df83804dc93d85a844a1dff04cd6bf11fdf16cc34544ab3c73724. 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/USHM92038974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d237a0b76faeeeffc49834a1686b1d31b22568964a932db363dedb5ee7f50. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QM6MZ2042508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48507434e1bf6f098349b68a9c7597e0810206aa1a396c18ae27806406c9be0d. 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/QMFME1906645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f48ba2751a9a6bdc5304d43e8829612a65ab2839b4430233d858607ebea83f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6P41964297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c3ce4a5b496fd7bacd4cab69bc9cf3fba60e77e35169ee504e95f708d862f. 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/QM6N21929882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27b46ecea12271862ab6f33c39a24db7045ac442b3e0ec6fea4ee3715893c93. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AEAOD1834392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb070d50734c37bc48bcc3cf10ad4dfdaff0b43f56b2e8b981dd8d40d0bde845c. 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/AEAOD1826721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ca7d92940f90abd93aa415d44dac05e52355d17e79bc83eb6c0675813e5ff4. 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/ES71G2202756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe2a63f63061d2c45249a629e463383d714c93fc1744233d4dda8039add968e. 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/SE5752296883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf258582a128678a5e54d08fd1b87ef5c91e8e1ab97f9a4adfca70a8578bdab56. 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/SE5752296884.