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 0xb373c01a11a3abe5503991bf39fb35f0de1328102d2d48e7c62a1af03cf0881c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4c14170-2a03-4592-bab4-71f413d2eb36.json and https://artists.proofprofile.net/proofs/artist/d4c14170-2a03-4592-bab4-71f413d2eb36.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 0x44750aea6e9f80c60c45b037faa1e44bccd6f5c956db1580bd505d091e3fbc1b. 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/QZWDD2448978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0073af65e2dcdc10fb906a3b47017b328f4a5cc718508815a8239766b6756a90. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTV32414499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db11eab5eff4bd0a584399f63e30d86c7347e06a297e888ced44612daed11cf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZGLS2442581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc96c03370c6cca5ad8ff396acde0e52c1f74dc87fc05bbc2a70d607be2f09c7. 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/QZWDE2454451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539a539f4b6ab3dc7eda1b684fea96d05ece8058db01e232527916ca1a61c411. 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/BKCMX2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10e3fda9471b00f0a2ef94d89a890f354b04e15bab6d017d18ae83d6f164ca0. 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/QZWDD2448967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b611b1fc1cf8608145c6d6f5d050ceec5a88eb1a62deee53ef803cb376efbed. 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/QM42K1958683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c93d3d3679c8de1307091a8b26283516b64d93d962c2473197517a1e07804f9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZN882504280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e455f15635a5469609b3f24161b34f4faf96bf04bb29f8b40a74b976a1fde8. 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/QZN882504281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438b44257ec62f8ee8cadbde305723190606ef2addf1a518c2075db45f3cf939. 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/QZW9M2452229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa348cde5f4656c8cd46573e76b3c83401459fe83cf3f3d04eeca5e23711d3f15. 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/QZW9K2414721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ffe55c87a45e49dd2e59be667f238b18bfe6f1a7cedd2f7e98d3a89dba619a. 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/QZZ8B2439440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd682519c2ce43a8917afd58711be8c726e495434a4314610e2d25ffea0879c6. 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/QZZ8A2486179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd704dce98d44b1d6d07c273e3ff75936b8f6ab1cde656d00e22cd0119828c4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTVM2415059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3095c1c8cd29a4620ce77f5b5dd47d19f46ae854251bc79d0fec7abf55c51442. 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/QZZ8A2408028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e855a81a4d51ff559accf1ff365d6525b52be0ac11f4980de67a73b9a435d6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZWV32490077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ce1b1077581c23f39c77fb46cb6c68f2cda92bb21f1a6d0475fc9c40ccc26b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZWV32490086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15adde9fb1c1027152c108ef0d2533aabf9fb8f245f4b3b5763288f43b9c8382. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZTV32424825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13492bd9ce5b99bcb32678c864fabff79d2e01787b7f613a3c9c7bb13660e95b. 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/QZTV32424818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4131e08b5f6f2906abc0c72f2a00aec982d682c50c22922eb8e54c738d198328. 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/QZTV32414462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882b2458da2c10ac3555f25d94d2b430552cea3cc48a1983359d0285971aa162. 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/GBWUL2446796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d367d8079937819285bc8121e420de511d1605e2d8bd1f8a7f9f529085ba1b9. 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/QZPEW2402618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a6cfd5377a003bd4444046ec456666509b6120e83b8f7fddaef91aef4926bc. 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/QZVEM2386925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04981ae3256b525e2f39e19d012456554b9140baff927e664497289bd65cace2. 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/BXIV82348920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc5cdb6f2a8c254951c550c7f71b5f11d4192351e684ca80fddcb70cdc95ff. 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/GBMA22310855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9527fd02bd5be67daec8b19df9577f6c8aa4459ccebffc61da055e89454fd477. 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/GBMA22310856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb626c72e102e533a8dcf6fca5beea12dc2ba414e81495014ec86d7655f73811. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBMA22310857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714e36138334ac0910278b1c04eefbed1bb9615073ede4e53705a068d76a83b. 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/GBMA22310858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fa3b7dd7a6bb3185b381100c5858aa6863aa32c4a8eb199e720f9a448182a6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZMHP2374153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf816a4173d13c33350d7ae0163e86f8c84f589cc9e259fc6c47ea05e696d38cb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMHN2340454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e402cb8bc3f1b9cade819eb27154789e160d7bce8be2b2d6759794815341ba2. 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/QZS642336827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d39dde305fc45be41453b3acecb86b2609dccac7a1f888d30bd3e4091d1f56. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BX4IU2346118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858710feecd170d901137f85ed83ef0988b0f2744b25a73630b5858ec29066d. 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/UKXN22320161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baf4ecf9a970b6aedf41f046913da9325db9bb0cfd6f2a4387002f0d5f7e2b4. 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/GX3Q92338078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57baa9c1ffeea311dfc646fae3bc31d990f37426c96bd0b656a832c11b19483. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ62139623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a2d2f09881b4049ab4c58033589c08c5faca6bb8b0681eb634c885c203cfa8. 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/BC8DD2200048.