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 0xa1814851bcd270585e4e0569a92aa94786d952857bc1bd6d9b7f8a9a8ca873b6. 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/656074b9-5020-4baf-a6c8-5b9f3a042c82.json and https://artists.proofprofile.net/proofs/artist/656074b9-5020-4baf-a6c8-5b9f3a042c82.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 0x968367394df073a36dc1e7bebcbf9e4afbd6c822fc0145f9d6e1bfeee5af4c5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42387833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce686f0dbac81169eee6bd8e9e4499181adcc1d325207c441a10c87ab429ca6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZ5FN2444018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2382b7156ed290537ab2eccf920c9666e5ed72d997c566f7490a647e4652ad. 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/QZ5FN2415433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd2c98e3d794aae094317a779b9feab57738c5eb3960d1c059f4796db046112. 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/USLZJ2417917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ce71e0341deb1e5f580910bf08b2756096cea4e8c25d6cf833508f0597195. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZ5FN2466211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe487df282f9d289682f6b966c154d699c64d72ddf05d17ddebb98b7c116be631. 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/QZ5FN2444021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d14244d94413effd01c4008de20415ed6eee072d6734c8fe461f365cf19be59. 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/QZTRX2463372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab13d570607512fa1ed69bdeb3f14dc54f64a460cac2867f60acf82194cfe553. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTRX2495366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb61e575502fffc6e69b288c13bf26b7c199a7f85b9a40724485f567047acdbb. 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/QZWDD2498492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec95b095c286f5c78cdaaa2623d79c9949cb4a2263d97bb1e18a69278047ea21. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2444693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed73055985412b7907221fbf1e21ca9ab5a7547452ec72493d566ea4cfa022. 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/QZZ8A2421944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf524f85e244ae1a3bd174828304aaefbcbdbc9eb232226e35be5386e80c1147. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5FN2596440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12e63d00d56f1ce7fc82590554180c6625869f97511018a638839c83c5b4df2. 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/QZTAW2508700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52588a52857b08f32f0f06a0e34d7e34f28b55bc834af06a52e57d4a5ff82a23. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZTAW2508702.
Colombia Con Estilo (Salsa Choque Cumbia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd0c90c12359cfc77449434aa5cd5793967ed6a0dbcf2f2795a8a7d2d65b397. 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/QZTAW2508703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157a5db2bc17f7725e33c768f220bad168b5b2a8487a0a6cb855dd56ca42950e. 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/QZTAW2508708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd627aefb94f427f6f11b7163ee4fbf79b07a8fbf6c5e84ac663afa2d0cd5dbb8. 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/QZWFL2544795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6fff49bc689d76236c161862b9a0ded42e85ed58be2dfd4f887f28823fa606. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFX2580594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ebe1da77ed89ff3b5be672546d5b556bba8cec92cadb8746e50158009c2f5. 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/QZTBB2592998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7d37cd9288713afd206a308312b4013bba2c2bceb97accc27062952dd7acc0. 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/QZZ7Q2591841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50267dadb7c9cedc41333257bf8a64593cbed1ead29d80e481c55aa93a79378. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3F32593080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d6e7c008e8268c460191781c7efd9cf84b3c42235e3dc900770e08401cf935. 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/QZZ8B2431986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7f27ef52c8e05f15913802dc572ebba3374991753d6a7cc8f9df867c51cc3c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN52325098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54526a42ce25d8911e8e12b3a9b8c04babb94a56e28dcaa5d174dd8db4c33a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHN52325100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dc76562a92d4885d8806d257c8f66b4b2ba94a0df3a8ddd73621eaea40624b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52325101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e0adf296dd7feea4fcafc5055bf0d9ce873c3c93b2b9e4cb37c37afb6007f7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA52371624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb782254d405bad9f2daf69ca6e97eb97f9962b80a67d8188e593f248e6b43f7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWT2296564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629915468ecbfbd08bd830abce86878138f18503cb8350909e395d5eb5354de2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDA72308692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e0adf296dd7feea4fcafc5055bf0d9ce873c3c93b2b9e4cb37c37afb6007f7. 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/QZDA52371624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce05cec3710a1fce6365bc202a215d70bbd3192fadb3a2e5309b97363e171a8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB32263220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b632de7fb4b8fca6993fa84afb6659133471ea35e6d5e19658d35a27aeab5e3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTAT2292062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d6c9db2e45d10818c2ce44c8e4398bc93e528f00d44a54ccfde4be1816bb4. 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/QZZEB2488214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280778fdbc6491cff7888001c3397c6055541692e2bc5502cfba3eb0ec75bef1. 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/QZZ8A2350484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d5f4e04887fa0fb9776816c9f5f7ece7ed047f8a97079599597d2f24add0f5. 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/QZWDE2489295.