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 0xfd8b7fcd40e95d16f141cc57ae6aba84701c687727c051a5b226c46b391c0463. 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/74ad9b82-0dd3-4b61-b3aa-99d5acc4ec70.json and https://artists.proofprofile.net/proofs/artist/74ad9b82-0dd3-4b61-b3aa-99d5acc4ec70.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 0xc72b80904f030ea94ecc36ec1d5c3827ff1413ac790ae0dc3446fb22febafd5c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/CZUM70700469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb695f7cd201ac3ced938df6c97a8d3f19dddc49f7438c80d44f228178822283d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CZUM70700474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39d58afa2f6eacd0e75fc9cc72b3db50db571cc14261369117b6e8c7b1ac98b. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/CZUM70700477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1186524ba00cb5765f624a462bc707f8b93a22cfafe8590dd49cfcce79e1c7b6. 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/CZUM70900436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb3240fbfbf1b9af90e783fa0fa36303cccc9c5518f7fdb520a9c243b3ec0a6. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/CZUM70900437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8cb5cc3d146c87b0bd6c315ec045282f6163a1fac70a25ac9e973a21ea6991. 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/CZUM70900438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f2ddbc8f0b17bf14c72cfba52b7cc300652a20db474a52e2a1cf7d84499f18. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CZUM70900439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270747d2d86420919914403092a442596cad0f69c298def6f474dbfb571b7b4d. 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/CZUM71200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b441b6884740a698e2f9f64d64975a334c3f7429485a77ae645f31c9e8287e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CZUM70700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bf0cef1627d728fc68187192669baca93b1edb7aaa57c4cf870ef4e6a51dd0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CZUM70900445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaefe806916811ad0fd47bd706948e9cba78d4ad653b9f450359efc06654fe93. 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/CZUM71200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2e95876d6af658d1b620755fb20d9684e123f12820efda2c2a0df333048037. 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/CZUM71200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e6eaabe9f13818691f4bd52922f5f7ede0b36254e24cd3ac75c3a94edcbdf2. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/CZUM71200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4779529efa6068d0e48d3f37e842c520f53797117d1f33ed187bbf2b92479a76. 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/CZUM71200006.
Martin a Venuse (Original Soundtrack EP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5047b8d1ee59d471709f6ac04e6c60155e7db1059d5ad2f31e48f582cf0844c7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CZUM71300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced344541aeedadae976a9b1259704afe8de92ad31c4ad71608b6de6559054a7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CZUM71200258.
G2 Acoustic Stage (Live At Retro Music Hall / 2013)
Zejtra mam - Live At Retro Music Hall / 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80262218292241343461e156334b61a7cd9dd40d2955c0fb9f62a33b21cb53ac. 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/CZUM71300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71650f925e4c3ca1bb64ddd06025f700c1b9c575bb26ca8754dd7b588f033783. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZUM71300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309013f99d598e249b39102cc07334e7a51d2f5e4261d93d907480e0995a4c54. 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/CZUM71400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93570ce683c021528e97195aab131972fc04782cffc286dfa4158b3a533ed946. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CZUM71700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2a86652766f0138e3286cc591b31227da5f4da670d94114aa3d942df754bf0. 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/CZUM71700175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e76cc6f4e51fcfb04f54735dc8a752019ae620cb82cfee35cc6e76a8f41f66. 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/CZUM71700177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8415c851d9475e081cd972eddfc0df0955a77ca75a3c0761eaa30013656433a. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/CZUM71700172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b494c277f9ac5954b7c423035f1faf346c8a6b4eebe4b8a7d47a33268d44e. 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/CZUM71700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d3966894483051282245768e105e4cfff7184b95a6e2a156a05633f5180f1a. 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/CZUM71800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc6cb13d0f69743224fb6a0c0108d6772a3da63cfcdfc60f13306be09800516. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CZUM71800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fc5512fa669a82fd884158886b00325cdd93b2e9c597c11c93d238569b437b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CZUM71800721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2895eeea19cefcdcc50b8b8615a15b9d2492eb4de7477d6214dc8dddf68faa1e. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/CZUM72000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b63e207690d19f28de374def002f1ee31e69ec21fe8448babbda8c34492049. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CZUM72000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5fba948823afa5b3aa332a0a450382512858e92047f04eef5baef358c5ce73. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/CZUM72000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6e327fb1b9eb8f684f843104603453acb2e91217fab8341e7a2e52915492a1. 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/CZUM72000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2a45b5bd2cc22eaceef45625f428ee3b770c4665a6c9e98428f3cd92e39e43. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZUM71600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74351405e42052084d56124edc56185d6d3da90616fadd5cee5c385aac493c51. 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/CZA100400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c95350402bccf465bdcb90d3e02bf0f15209ad008b4ae19e5423893c3a8614. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CZUM71400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6145a8663f88402402906137d5e4b4e87834e280609a45c9105e52faa17932b4. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/CZUM72300772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a1e7dd422457d58fb4b19136355b2351ebacd1eca80789276cb21023c4b027. 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/CZA161544193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5022c3fa141539eb8165b19d87ed0916936d40884bd4e6819e173401cf1ed604. 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/CZA231200380.