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 0x2610cc2551fa76958b132249665bf8c1e29a189a7f546370f94bf36162b26c7a. 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/2129e32e-3d9e-4a80-87d5-affb80924a64.json and https://artists.proofprofile.net/proofs/artist/2129e32e-3d9e-4a80-87d5-affb80924a64.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 0x9acaba02b87e56dac468ab4350cd5f11285dd52352f07e8a55e1f6249f7cd435. 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/HKG732138747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b3138e126d6d56ddaaedd27d2865edae22a260a6dcad6adc058f48a8973bd2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732138749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c5385028209df89f1c5645027fa735c1d3b7416addd47e7ec1fdb1a674a6ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732138750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c1fbfafb7da59608eee7891f16d0251b4d38aa79f930799109a86ec0792fc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732138753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd082bcab70aa8666f0e0c15d9bdacdc5e3db10223de42aa6512827f94e38fdb2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732138756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6abef60433f010c96f65d9243f5b2be535df16ecf1606344be45b2bdd57368. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732138757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dd459a1460ce8f368827231ed87323f62d56b1844b2dc70fea1da45c4e2d1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732138759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f4c57bdac5f0664bc0a0c053c6722f9a1e8a275cfbccf6bf56814e193c21e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732138760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42f8cb3d2126e01adb062d020732d9a7636b3c2398afeae4d0b3a7c6d2c7745. 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/HKG732138761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f81e884b3579fd9ca37822493380f391997c2e98216b6bc8c84885ac5b894b. 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/HKG732007223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af6ebce70ec5870122f203c8c2ffb2ed4fd6ee033250969d3e34501cb37167d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396fa7bdedcad3702171923bc2b48c5b9269a121f148fdfd255d88144212d0a1. 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/HKG732007232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce7d5c40b858fd5fa7d64663b5ba447e7ef8354a07146600b6bc6d2cf8324fc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34959f571ce4e4ce380cc4552444971fbe6a890c71dd398f93c97542826e159d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe192d326dbbb11416774c67de71555758021793f986013502735bc430b075ef6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7041e87258e08cf221bdf7f343f24656f4806f75b54278eda2d9625cbe6a3d48. 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/HKG732007258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fdcf727504af4953710c4385ddb8210516c2b913301f29755aa06002a89744. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdd7009feca3414296e2241f4197ceb2f9e0e27cede9ed06a5e95ae905d18f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a485288f92a3c98fdb0377258d063a802552798737254c20190d4e468ac7583. 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/HKG732007268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00181fe8c3eb3075c03db4d6c2285572213fdafa04e91fb23a6c521200a38a05. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc87f073470c8c18df62a40a2e822db5e697bb0832ca73df88f76be90a6fc84. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c8f49603b2d141f111136befb2f62b171938546441b30c473aa49c09bc996. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNF290940012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0889efcfcfc4d920e10a76d1f8765f51f889de4e899ed66c8648b9aac855b0. 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/CNF290940013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451b5393b1a16dcaa457c66b3708e5acc1e149dfd5cbaa14631ab5024b4c78f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNF290940009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba34c74515801d1d07b802ea85b92ec120d2ddc68cad8b1a677578e78c455347. 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/CNF290940011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcd1994d31f27f4787f6f8f0c57d73a1f10c18cb1b56a55f05937eebb06b8c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNF290940004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3a6a2859eed5b83dae745423646c0f42c1e4564f4cb1d92833205f136e64b7. 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/CNF290940002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7cf343d80584ddd4613bb7d6538eb96d2c1e1afb048f2b40e44363d0473e3f. 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/HKG732306280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a23009c355bba2eab0354612980662c7f0a27a9eaa5c4a8aa1fb8a1cd91b96d. 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/HKG732015721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1a9c1bfbcfef8a6b0eafe743067fb744dc59d5abd9f2a27ef1408e765c1e90. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732015722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6bbc8bb13df45a5c6c6edb8ea35c818cd4ae3dfb891f264224c9133e158c1e. 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/HKG732007299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f980cdd67e3db88e770de5435023b1a7d3244fcdb5c5a8d82197f9834cdfc3d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493821486afdd8383d3b5d0c3a3bd7a12f04bd899d18e212e2aeefe4461aece3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731902310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75266782fc6432eb203e38b1298f093b3ea2405e64528adb8db74436af24b4ed. 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/HKG731901827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c074db86e5e46a3b3f1e4851a7774f1b3b6b9d34155418f4404d01b2d206306. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732007406.