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 0x014da9ec5fe25fc0ed2de333db0240797a8db7018f7da0bfc7734a69930ac343. 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/ab29a77e-15a8-4e73-b690-23dcc54c4bf5.json and https://artists.proofprofile.net/proofs/artist/ab29a77e-15a8-4e73-b690-23dcc54c4bf5.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 0xbe498ded6465da377a9348fd5a67e64a3efa422f77e5ee3deaf799775ea4de60. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBWMY2252300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a3b8b3155e2534a004ed515f95afe06bb2519183c869dc0f1bcddf2476c9dd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5ZV2008401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c3017f518c868bff1a7fd526cb4fd0225beb54c040fca0d077a3865d6cbf7a. 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/SE5ZV2009401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe876ad03afcfe65c075ff162b8727f9b87aa4aed3258824d5c13ff244e86de53. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SE5ZV2012001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f5feeaa59536eb87c9a485e7b8193f06d50f8c4e9791367d23a37e2dee7163. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SE5ZV2012002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc607cdb241b86a0f557a5ab5d3d87cfa7d1ae7d2c894f00b624a33e61c7d86d0. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/SE5ZV2008901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706694b037611ff9a61cb11061bb4511c018163925dad09133aab54c85663e56. 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/RUA1H1925452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17ce5c5993f20ffee6105355f73e9b9f25f3afb98d7fa24197aa8466a87d8ea. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ93L2002910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660fb7d4d7fa8f30feca445cbb3415f7229ed8bb44b630f06db3116241b487c. 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/SE5BU2019460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440c617a1e0bab581856cfaeb51daaff6a91060dc7ccf08f2ef9a5ceac0f3387. 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/QZDA72044458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434ccbf36fcb2a770cd2af5369a90ef80ef59f6a8b7d206edf050d8c7c8e9d2b. 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/QZDA82028392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf07aefd70721f672f1b4bebaed11162633db099f604ec220fb61b8e2a1ccb8. 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/CH6542007250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf12f40cd9e0ea44676491467e820f9e43714fec4731a2196a1f64c702ceaffa. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBHLW1901264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90e29ad42a23627580a9e69e70207f74f3767e6d62fe0c9fa7bcd557b2738f6. 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/GBHLW1901268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc6b17e3d93d8eb3fa630a5515ae3d44e51b9efb40bdedc78391b9634d1683b. 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/QZK6G2478249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7154a1b8a457afa2be147d94d3ce13e0388358987396c20e868bb8f567f45a. 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/QZK6N2427909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c1e6864d3c6a13289f1d9bc432d8cc565b134c72e7f425558adcb9b205e0f. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZHN92434379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771bbfa7e3c3f6e5c3cf51c8980d9def47a32a60c8b2472b67fe90790d504f9c. 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/QZ5FN2471774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf0dad743dc4713edbea51de48f336bb93cf0db1d59459a02db4fe33d17dc80. 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/QZ5FN2471769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df6256be5a4dd5208a140f6cf87b459dd34d64a96a27a7b14d32f33b94ec498. 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/GBWMY2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030c486a0d0532bc0ebec3940a5d695d6f24d61f90fb6de0a97a2cc2ce7da6fc. 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/QZ5FN2429473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7657f1a2c6f6f5a4fa475ece0294da01b512daeba1c64fa791f15bab55b15ff6. 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/QZFYX2419134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ad6a4eedd337be5c4d6426625b15d2b91bae0b6b6ebaeac5701905a9e979c8. 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/QZTBA2395452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10015284982a7998474aafbddb6298eb6327fedf09a720ce3eeef094dda7db89. 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/QZTAZ2384655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b073b00aad7f92f85f33aabe5baa628b1ad142758c6a61dd77a9f87d598283. 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/QZNWZ2399516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b2af8cbe48786833b1cf298d3d7c4c0c0286fe3109523a87ae0570c3eb453e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DGA072315992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b2a3f0b15ac7f3277dee7685fb89070f20a99e29ad838ea28fa6ca1083841. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FRX872321333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e2bcf4f1c898929536f35bbfb0650edba6f5adaee164a33f50e9fcb7bfb7fe. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZFZ72319476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655022277593f2ba5ea93674202a62cfa43bb046d2cd18ddacaa5c24a08d27e6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZFZ62388593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9f1137ee692cd986c8e17af1ca3cd8fcb53aff1002648560c251dc8acf35a. 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/QZFZ62380293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165a5b2189af0dcb0df974926f778dcbc0514f2cddd4e25f01bdac2059b146e5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZFZ62372308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb688a7cb01827392c6e09fc4c647ee4449cc91c1a83bd5ff5093f7eb52b59f8f. 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/DEPI82301669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7af5fa290e8578a6a492f1b66616a89701525f58a51f5e27cc52c49d2ff892. 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/DEPI82301302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652383ae760a57515be5c806d84435457c2f1d0b419bb0339df430dcb2a61d53. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZFZ62353565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f085032bd1cf76206abc2a8f39cbf94fa4c9f15499ec4fcf2f59d18eca95b7. 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/FR10S2397444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1543653bd1d7d0375ccb320082b49e31846b3519317ae781f0eca8132f56dd5. 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/QZTB82292276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe498ded6465da377a9348fd5a67e64a3efa422f77e5ee3deaf799775ea4de60. 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/GBWMY2252300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddbd9975e500d995458134b7dd7f4abcf73a1a1aaff4ef171fb5aa1e17a1f98. 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/QM24S2203019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2e50dd018d01a2b71e8089248cf1b000dd9bd0a3c5d766d8789a039a30c796. 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/QM24S2203017.