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 0x30c17262fce61515b74d9607e8f57242f52827f788063b7910e80f58f0307888. 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/7aa74263-aa9d-4a88-b62c-db5eec0b1375.json and https://artists.proofprofile.net/proofs/artist/7aa74263-aa9d-4a88-b62c-db5eec0b1375.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 0x7b1ccf6f96f5f7ca5e31fe62113c16849fecf00826f40eb52301ba1416ac3a4d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR10S1985756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f477b01b305426f3cbf6af2f3097035e09a399241874f1a41b312e777c6332. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR10S1985758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac00bb2c89624b1d5db7b7154f351d2d50c70a4beb6f4286a32f0723f68b38c. 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/FR10S1985759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e9bffeb09532c04fd3b21dd454bc7925d668e71fb89e1a708ccf2a716a4052. 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/FRX202033739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8deec93890308cc3553524d5fb7f1d89a3c9efaae3c6c40e0099554a251bce5. 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/FRX202033738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e9bffeb09532c04fd3b21dd454bc7925d668e71fb89e1a708ccf2a716a4052. 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/FRX202033739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582d7ee24c686afe416f15b8fbe77a9a897f9ac91aecf011fde12f902e4878c0. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IDUM72000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b6de34dd6214f933a2c6a22c2919694d1ba74434ad12a84bb959cefb648865. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/IDUM72100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6517f8d50ef54fdb7f10589b95225aa7791a3b5507802149756e48f1b471cf1d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/IDUM72100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514e3988c592d7084bacf9eb115785485ace9b41964f4fa19a8cb67d2f7b3af3. 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/IDUM72100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16c14a2032f70a667004e86c6a7d4883097a75c15de6a142c814f7211be4ef6. 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/IDUM72100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c46e482a2e32406208c3b3cf9b08497f971742de5e92639b3473b4956fc4bb. 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/IDUM72100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca7b43dc943d9f8c0d4db348d610a93e11a301c8ad2b79de6dabf7c77083133. 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/IDUM72100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c9a86054754844cff6c04264454c12c7faf03d9b91fa65639ee82689f59f0a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/IDUM72100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76896a899739b13c0eb57c581a34c55de3b720c0b34fd7b352d1ca085a5e6c4. 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/IDUM72200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b772b32fa968320bf5c749e206fd9b88cfa37055653aec7e22ba3552afe117c. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/IDUM72300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2488a2b8738341401fabb2713505fc1c365162068d1b7087ab628422f1567c. 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/IDUM72400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63b4ea867a0f120fb7f66bcefb52c0a54af16700910031aafffc4b8e978741b. 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/GXD7V2566712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c85be71aab1b3ffe2d1e33b5cee63b48f3a60ef53567e728effe625c1d6365e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR96X1985258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc7fa2756e92993c1be01817c5be900582039c1eff84b667760468973f130cb. 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/IDUM72400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9c1cefcecbd7b475ac3aaaf11db1be27ce93afcb92ecc0c8c9faa82441ae18. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMEM2020379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c00be950ba4941fddca5ddb6cd2a8d63ef1bf063a84122fac271b01638d79a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ID2DY2300038.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464b1e933e7f2590a183d160c105423866b672427bc32c21bab3e6bbd5dcd19e. 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/AEA3A2498928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd41c343ad09ec46d82989ae8e376939bac84346af29b9d2a5f76f96444f92. 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/ID2DY2300078.