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 0xf63ea42a2c0d9e65d0137c18283b662b7cf5a839d7279be09b25e226aacbeb2b. 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/0bc00c8c-f161-47c1-ab46-25c2f19034f1.json and https://artists.proofprofile.net/proofs/artist/0bc00c8c-f161-47c1-ab46-25c2f19034f1.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 0xa7f5de48530d845f479e9f154e30639870e707ea135431d830e1f0fd7113e3f2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FIMUF1200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7042c98e706770bc58c468daf124d2fe8d0ae4eef7dda199417884b3b8c6bc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:52Z), 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/FIMUF1200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6e6ccfc050c019614839317ff8a4bc17f4d62066efa3421e848a2ab8c72155. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIMUF1200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dc96431c30df1eff481427180fccd6e574a622b3ff7c14e0457d1166386433. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FIGRF1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aa5a0ae749a0c759b11c90bb657e91c49b7a9ede1a775842d64f236c7184a7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FIGRF1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15488d67bb3d333e977eb92eefd4ec311addf686f41d794045dd992f53eb90e9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FIGRF1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0869e5c27b69ac52543ac0467add2280791ea6ee64c7d1cc18cc3d14d25e8b08. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FIGRF2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f43bc4f507d1ed476a139702567928fb8808ffe30a52fa116e3112e1132fe2e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FIGRF2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4674e7da977756362c59d6146bdb69fe01ff0900d579b7012a21642c39f565c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIGRF2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b794f992bb835608de9671406a9cfe25dd4ce412a20f6d62affffc20a7475. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:30Z), 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/FIGRF2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27503d01d69f075d1ef6ba6fc724ccb28b2d4e9e61eab3e6f5f7e0ed35b51ee1. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FIGRF2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32db570d11305b722660a1205e24d167595db68fa39c8be91e905eab10072ff1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIGRF2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b5b57c308177b7fc879367d70eac1993b220b0669f44630e684b944b7744f6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FIGRF2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1a522d248c847d1f42502c0426e779a6ce9d8886310ef950856b0e27d677b8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIGRF2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56114b36c34f421ce55f1a25b0e9b9463044f9684f5ab18632184c22c522b19f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIGRF2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6a886361bb643c3a8398b2e8a5f542a2de4c7ba602eeccef2742d1cb957399. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FIGRF2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730b44260ba88abd3cf6d3c3e242f721acd984dce47dfbcc6350cdadfaa24899. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:51:36Z), 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/FIGRF2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f874b43be61359ea76263c7f81ba568c5e3f2ba20d9f6e11f40f7e8edc0bbd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIGRF2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32faf49c210da3dc56f8fe5fc28609e9238bd75cba034a9e7710685e7c1a0915. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:34Z), 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/FIGRF2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b6a9b100430f478ea32d01893cbce25f79c9d9babbe87ddbf24330752556ff. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FIGRF2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f765bff2bb9ac640a8f16f5951b1eeecb23c10db1d1eb33665d82f1bf40d7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FIGRF2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd287ddafee7d398f6c167cad2db5cd4c889c27ef41c541e1d216945aae602a4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:22Z), 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/FIGRF2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cce9f694fe03b046dbf896f09360c07161d4464dd02d29d036c8d91a20f643. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIGRF2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256a89baa63f772dbfcb88e071146181aaff774935c4aa8a092bd7fa18087ffa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIGRF2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fcbe944afbf97267064c1778888cb8a289952bab26f0bfd21297487d3c0d8c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIGRF2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f765bff2bb9ac640a8f16f5951b1eeecb23c10db1d1eb33665d82f1bf40d7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:44:43Z), 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/FIGRF2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1ae3eb52b40655f65235b3364b6b1d28fef72013cb0c1662d0ee45099952da. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIGRF2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7b87b00046aad4de5132f24ad6f1cfa4f51ed2e6020335a5f5db8cc527373c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:48Z), 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/FIGRF2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c42de2c74bcda8090781b111161017b5925e66e83f5757b615f518b49a56b3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FIGRF2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeb6f85e1255b7092dd6752dde16f902d15d7de1db1f81dde1eb2b44b2038ef. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FIGRF2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a0aa7d66bab4193105a5131933fa51dc4f2c8ace9faf0b1068b73de639965. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:14Z), 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/FIGRF2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f2ec9349c38aa3af5eda1f987fd8cb4b706ab8d57cdcd0bb91440912a03172. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FIGRF2500040.