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 0x2e9f20cc92204e8a3b02fb70f4923e2e6c7d57b8c5b28a1c273639d94ee9d444. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab3226d1-6ada-4ec0-b201-4d0cc784417d.json and https://artists.proofprofile.net/proofs/artist/ab3226d1-6ada-4ec0-b201-4d0cc784417d.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 0xbcc0b97fad03fbd1209961ac59534a6b5ebdfbc78ec405db71a658ce1d23162b. 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/ITH712100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345442f12aae40f6d1d38cbf9f7f09a2aa7260a12f65f5302d40627f5527ea86. 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/ITH712100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ea0d61932d189eec45b5b0031eff9d80ec8ea713007ce53b00aab51669f163. 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/ITH712100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57163ce72acb25d744e260e188265c9a42de953180846e6e38c7b03aaf8d6ac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITH712100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc85cda688418b98328547670fd3c3aa312f9812f54ea3284b5b26aafaba4be. 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/ITH712100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f249ba6d8a3997a6b60da09b8fb7f55aeb7c90fd4f0571d6db4e2564bc8561. 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/ITH712100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2842fac5efc939441448aefd4bdb8f18392f2f87e4a9283a1019e07d54ed5681. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ITH712100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25765f699387f8d311d263655243e0a062b82b3b0d601d3ad4c50d7d024815c5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITH712100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2917b9c42feef017400c0efa51ab10b373d075622ad60b1386093d2579f42fea. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITH712100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637daeb386dcc594d0e0eeb98a223199bf2dec72cd9d185cede6f9a7bcd41bd1. 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/ITH712100076.
You Can Miss Something & Not Want It Back
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22605822fa59b06a61754cdddfd3d6d895af745072a0133130242b099dae8b37. 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/ITH711900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed407786fea54d570b3881f24515d707ad6600056c344281bd39b0143cc0c2. 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/ITH711900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb1e7dc770ad09dc8343f54fb3a8370758d3cc36368459e0a99ba1fd34b17aa. 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/ITH711900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bbfef514bfa7e3edf976bd28196d846e4f727cec940de6ecdbcf84462296db. 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/ITH711900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb4a4d75f50dbbe488bb4b4df5d09279c0ec2a32b43f7ab2f243aacd259e94. 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/ITH711900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2cdda890e79e542d1dd53b5dea09533ef5c4d20c1b6376d988f894038bb997. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ITH711900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af907340907052092237b064eb80e764d9fc487feedf9aa6772c2652692226b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ITH711900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090817061eba8d5bc28713b4325d9d83de01b724b80f9ca85a15057b13e01316. 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/ITH711900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bd9b0a10fc446edfd533b347855f8f791887b4c15e4805dd4105a7cbbce19b. 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/ITH711900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988a3aa88f307435a968ab0e1ce1bafed88d733d13fd74a9f50e2ded4fd85033. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITH711900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57163ce72acb25d744e260e188265c9a42de953180846e6e38c7b03aaf8d6ac. 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/ITH712100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25765f699387f8d311d263655243e0a062b82b3b0d601d3ad4c50d7d024815c5. 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/ITH712100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345442f12aae40f6d1d38cbf9f7f09a2aa7260a12f65f5302d40627f5527ea86. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ITH712100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9456aef5951b582f043654448f8817e980e62101dd2db0683dd0b1c1f1d056e6. 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/ITH712100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb4a4d75f50dbbe488bb4b4df5d09279c0ec2a32b43f7ab2f243aacd259e94. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ITH711900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed407786fea54d570b3881f24515d707ad6600056c344281bd39b0143cc0c2. 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/ITH711900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6dd41b79cb4a6f8272b57f283f7f34b0fba54850d8facdd0072ba9a941ba7c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USDY41686132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe27c0c303dbb3a05e1b4514d9a9a1fc68f5da72b1d43bb627d653576118779. 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/USDY41686133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe861199abf858fe0e888f1b67416a10f99fa28e04eb68a3614fb5586a66ebb20. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USDY41686134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f7b8624b43b8f5c67b1ebf03aa48ddc714029fca32cf2fed7df4aa25353975. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDY41686135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9b6ac114b3a7ebfc79bc88d3584558ddd66a277ecdfe1fd1c643fcf4e1152d. 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/USDY41686136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a99d9ebdd3aa8aca9d6da45ff7ff2fe9450f4581d4daad4d84ea6f0bbf500ed. 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/GBSMU2857433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc631fd297583bdccaed9ff109eb7d485ff13e8f74573a618d142db2349cdfcb1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBSMU2857441.