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 0x5332dbc95978de1f7e216657f9ddcc867cc11813e0a3218705ef7c08a481e803. 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/55eb36d2-4fcc-4887-b2b7-538b5fb8d401.json and https://artists.proofprofile.net/proofs/artist/55eb36d2-4fcc-4887-b2b7-538b5fb8d401.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 0x53685b19358dc599caadb6a422a2afc6fb171f4e0cf26c08da1d6e9f2d9a831e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FRX872273167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5a99ee4cd019beafbeb7b5e19b5671c6ca3659ab100ba9c352e7d99f52718c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X42348365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9309ef381434e829023697952ab6866798e5aff69df544529612d2a053737f49. 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/UKEX32320256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac2167e067857fb7ec4f0906def1ee099b5a487670bbdcd82b32250a8df0fa4. 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/GBKQU2383678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2aba521157c4256db889219d9d3a237146f8267150369586c5b32d4c850beb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBKQU2388529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1408d031305e9bb3b05c98fcc5764450d3b3617fc123471d72ec788fe20d2522. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBLV62307460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a740be628025048cb1322d6980cd657d6604391c044f09ecf467f601d9fe14a. 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/CA5KR2457481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1002eb071408e9e6bb4e0b0f0216144fae9a1ec72d5850f330dbd202fb980b80. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/GX38U2442813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8102623f83c502d8d5e5a67a593aa6748a89afbae3015ea496fcfb06833fda. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMDA72403086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21f29271aa2bf3298ebf510386784ca72b7bf9fdabf0d32dc2a3aa71b9a436c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SGB502597159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a43a59887776fad271f17d4ed33ea567e86b6afb6cfda32e97f625d0574a3e8. 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/QM4TW2558911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c284f41c68846c7de533bdc6d1444f04b77ecf050e9a39716f482cee72c46ff. 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/QM4TW2558912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14747052458837b829317273eb13633b0ef63acb162147bb4c7b44121087871d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2591277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44ee4030ddf9d9d706aad5f71cc416d5201eedbc044e16449ccc5521910bb8b. 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/QM4TX2591278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5290d858fa55bc45b4c37904b4ce9daa3db19e68d7677b1cd64192ea133c88. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/GXD7G2522845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb55355557f9df164873aed85cbd92628ce6d9f873fb7603d8fcbc31649993ea. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR96X2585623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab54a66661acccd476a11fa08c44fc2fb64021d790bbec10cd7b210494ab72ba. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR96X2590256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c764cfb3336d56afe39252be9a49f933250c6c321146d1676f25cd72d25bde9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FR96X2590257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b4a3b6700a96a37d8dc973fa3afad1d37f80dffe014d4c589f5bae150b5e73. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR96X2590260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed4a9e6ac13f42b0032787afc58ede168788031b2bb0632350307f9f8b936ca. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FRX202523308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09dc3f1931ac0eb12ec3ce15858cd658aaa8304d378d9a787b714b0d21488f0. 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/FRX202523310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6ca3c50eff0ec39080e6ec8b283549d4affc571b98af0f7a7c929afa1beb33. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FRX202551478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8e86ab65a8d003ac664976ccc197dfe8f60d559c5302322fe7496661562368. 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/FRX202551479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17a449c9138b5c30f5d3d376b0a6f7521282734479de9351da2b91d935b9f9a. 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/FRX202551482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12a7ea70d71ae2942a46b6245bdde7d994e5bb2a479edfb7f3db4613d5a2aaa. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMBZ92574354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25d257641b3b88a40d95adde68ccc82b43f36b9d164057bbd24b3c1f2822ed1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMBZ92574355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe03bd0ffbace2b65f29c17f6118d0da73a0ed624d48ae47a7eb7afc39ad2c6. 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/CA5KR2442391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ea64aae2e66645c74d342e914f55450ce88a1ab5d1baf636e558250b97fc70. 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/CA5KR2442392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf239546d0a1de3682513b0709ab1fa26862c80cdc1f2fe52fb006ddffbb4f90a. 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/CA5KR2442393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc23545fccfc5b3db55fd1fa49b19b33fe4be89d6458d0f9b457e7c8183ef44. 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/CA5KR2442394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb27983bd777cb9ada24832bf0747a4d86646897727366026b407d2e12d85b3. 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/QMDA72471169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb5e39aa7ccbffbb8736b6931fc9e2830164e574b9939816d6bf0ab64c8d5a5. 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/QMDA72471170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b6d45a6d3e7c4efdbe2f1944df441cfd2614fa792cf0d99241f664b05f6705. 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/QMDA72471171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b290335a97bbf044887bf7ae515982671ca69426ae393d6549110fe986871d9. 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/QMDA72471172.