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 0x46ef97191c40280b041c949055c893eb3b00357578f1330890c7a883ab7ad65f. 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/fb210f11-323a-4145-bff5-946adbbe0905.json and https://artists.proofprofile.net/proofs/artist/fb210f11-323a-4145-bff5-946adbbe0905.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 0x6ee895edc1efdee7c3385f882530121109435edd671bf38346ad46eef2e34a28. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GBLFP2353412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aa9d231f79540183f9aeed82c1bd6aa555af6adde49bff776663df9ec66dde. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBLFP2308081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe107d2907ca653fc11152ff6e505764f57d79d471eb3ca2d210d6f3ef2f94811. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBLFP2349598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea9475e014caedd7f454eca37716513425850267411e4312ba768fccb8fccf. 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/GBLFP2382436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea9475e014caedd7f454eca37716513425850267411e4312ba768fccb8fccf. 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/GBLFP2382436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465e8949e9d79fc6d3142b273f28d539a8d4c131cfffcb86fa01e1540ebe422c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/UKXN22341929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465e8949e9d79fc6d3142b273f28d539a8d4c131cfffcb86fa01e1540ebe422c. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/UKXN22341929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c822efc61c8d2a4ab488b2878c576e643e0ede1e82073dcf4a7fc3cb7923fdf. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/UKXN22345809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c822efc61c8d2a4ab488b2878c576e643e0ede1e82073dcf4a7fc3cb7923fdf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKXN22345809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aea7ac32d7a2d3a84f8c22e3bf12e6c67e688a0b16e48df8d8270b47053b2b. 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/USLZJ2425765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aea7ac32d7a2d3a84f8c22e3bf12e6c67e688a0b16e48df8d8270b47053b2b. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USLZJ2425765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9282e95195e1b2b9d59b7ec1ca3ecbd07a68a849758718302d3993733331a8f8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBRKQ2425088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9282e95195e1b2b9d59b7ec1ca3ecbd07a68a849758718302d3993733331a8f8. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBRKQ2425088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16b0a393ea7675f55830904ae13f71c1645abe85da52bab0094bbefb713dbbd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBWUL2483491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0548a22ef4f9cb967de9d784983642cf76597435f0872d4ec9c001821af96a15. 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/QZTRX2408052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f7ba52d0c1b5be3c17d7e6ff1cae6de5d9d1f28acff1527c33ee85dcdee9c6. 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/QZTRX2475428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd822d5ad56fa6953154b9428693ddc8d50615c4aaee811635bca8080e7e04f4a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZTV32448439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87272fa4265c4d48de6327fd7c3c9008bb9e75d2579fa20d8ba371ea35033533. 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/QZWDE2484267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ef1b2ba2772c954ed78d359c1c4e1d017e3f8346b17cfffb4c8542067d5d4f. 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/QZZ8A2423977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26bfae49cbefcce27fac837c23531a98fd01f55a0abf3fa94f3d5328f8df771. 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/QZ5FN2520904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059ee3e225aeb2ca7c95f508412fabc7d8f6273e9a5d75e6332f1da49617f929. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZ5FN2597424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059ee3e225aeb2ca7c95f508412fabc7d8f6273e9a5d75e6332f1da49617f929. 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/QZ5FN2597424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe084cbfb12a9a01ddf853e4c64a39212d8bba2067b6d2c01c462e046a583258e. 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/GBRKQ2525796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5592cd7cdb4c5753545a83a4b1ba5a1523242c17b7719c104067ac375ac9b902. 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/QZYHM2509650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f662c5fe29873093a0383563f35c85c7c2492df100380d5445d237b507477. 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/QZYHM2422845.