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 0x021fd939143aeb4145405eb39f624ed8a3f722a56d74ba0528ea957f1de39a3e. 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/ca3dea4e-adfe-417e-b9c5-76ecb15f6267.json and https://artists.proofprofile.net/proofs/artist/ca3dea4e-adfe-417e-b9c5-76ecb15f6267.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 0x1cc85b724b821ecc382e1087a058566a64925bd46c963450a0e6684a72ebeec8. 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/QZMEM2129693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a03c7f21fc34e0652ae50f93e1c83e91c02b812eeea103f2893f176c1c8b72a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMEM2129694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c7a56df06999031211bae1b1eae3722de249bb4fa0a14be99d7ab98ec04229. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMEM2129695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3697691e216ae948948a3c4d24d0c5cb443bd35cec29a285ca8ceca9d4e384. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEM2129697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf821c6db3c720987932f0a8080015717a53ebb4226aff0d8b437f809bd451e. 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/QZMEM2129698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d900ed771bd495dcf4d0deee77ae78f413e2593e7c030253bba2180a72d564. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZMEM2129699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79884d9bcce665c951936a953c36eba9ff161dfbac4dae40a733e1cecb3db1a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFYZ2280024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafa6e4bf83c2a95440c8f17f530634ecdc90b7f584e3d102a7ecbca814f6917. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZFYZ2280031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9072fe2ab2f0c0b2e49a748fa95552f6b7e614b74b0148478a2100f870b7c021. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZFYZ2280033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54081552e893d2b5faa836c3667af56821a694e11c59422819837cbcb3571505. 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/QZES52223831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf09dc1c62275923151411d53a930bfa08fae9408fb080fee8782630e373027a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES52223832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f83340137669aa0ae7d2c585e90246641c594bd1282fd509b98b10a665d6ab. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZES52223833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f21ad5d8cd268f6a17499a3d977199a7c632edbc6f66913729a8d508982a2a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZES52223834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1a6845499067685e142ad79c0651db260061c5cec0fe0f918f514c047dc0ac. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZK6H2205912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0582142d60b7386376c6e6e1a4800ff643042ce304a514e1d14f9587b4367ed2. 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/QZK6H2205915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52035cd71ddbadab99a4556a72e83e715177c574917c54839f111b22c687c95. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMEN2298362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73502667820dbadb0f8f35ac78454db65b1e79e6fe24ec0c6ff94428030f71ae. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZFYX2350075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada2b5be6d874e6bdf7797f4af4b9a00d4a75fa006a9f90391159f4962fd7a44. 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/QZFZ42343159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa399951b4e41af5bb4d12eab715383a92b54ad398355ba5cb4531a5da191db4b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA72389139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b0bf120d4ae9c6b1fcdd70210750355bfbd0e6c697d3cb6013757f6e07c5d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZDA72389140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b308390b81b93694da359431f92ec20db7f8fb73165b3f50df47494e89b1257. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZDA72389141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0d9258f9ddd99f5261e806e62dac6090f63f4de8830c9e96fa699bf2734a7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDA72389142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc322aa6207c51cbd56bfca1a58f4b732415c9e278d1ce74722395f16c225d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA72389143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f6dad810cad1d2f0d724f14dfd4714bd92133b66fe04a960b18423de174ce5. 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/QZTAY2335429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c21487e413ab325779a6345b01d9f56bf510ab7bec0ea7a7da8e610de1e2a7e. 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/QZTB32311704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cde99337af4bb9d3491e8383f1dbf5f6171c7aff6d5470c052abfc8d975372a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTB62372394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc1f71f839f858ba8b863c363e24843f1511072a50582bd9a62b6ce2993f21d. 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/QZTB82378524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac6544043fcc9694871e132d9c6afb369addbf1c8f8601ff3b781a832c59f01. 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/QZTBC2335428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a70ecde277c0c1a58ac055fb4a6556eb959c76e4bda14f51469da173688f933. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBC2354313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb637cdfb6d9e8ce86c4ae5732a80130219f2b33ef12ba600a6b37824a646d108. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZWFH2348067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279e391ac660a051da6ccfacb0de8125c87b17fbdecce1161eb1f78ca3e2d262. 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/QZFZ62497169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd281c9b1d55f0e0959764c7034448657d08106211ccdf4f871042c475c5f9. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZDA52423117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a762f4a91bd5fe5668ad2095839e771a28e30189dec4cbe6ef4c843f17baed. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZDA52423786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bebd0bbf4c976e54e5e1b4e1157606e846f735a430e2a8a59e5bae304ea3b14. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZHN72453878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658867da0b4b39af4b8f96998e83321236706da8f3d63b7c93d2865e7bfbff6d. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QZK6L2484271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf4b7335c01a6b05c0f378763ade82a04bd4ee6c1cfd91b3a11f0fdf79c98bb. 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/QZNWZ2482222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46d3d09eee9370d145780045ae791395915d3c0e6c987bb20531ff9aa2588e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZPLS2483455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacb0a01d6536ccc80377d54f9a56f4d02c55c807af156f9da0f720188e11a34. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2483459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f0a0d22f6454714ef5e560d0e61d32f5705286953a46d4deff46dcfc68d8c. 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/QZTBB2434836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787600fcdd20246c851760a0c6e24122d21b6533c7ad3fc6357302385a635598. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZPEW2545838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1c172384c1e71867e6a875b9ad7515b2a6c301f079089661177f6dd64449e9. 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/QZTBC2354237.