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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d369c7b31ab4fa19c26ec61b54871e2de380e14e4dffc4b9a10322bc1165f47. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/355c1d18-5428-4d1e-9bc2-443f00c0f74e.json and https://artists.proofprofile.net/proofs/artist/355c1d18-5428-4d1e-9bc2-443f00c0f74e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd43b34b9ad9b7d77521f8537ad409b758c95fc6ea8c3418e982aedc19f12049. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82448377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa99a99e45f748b2e60838326da75fed43e78ceb8a0aca9a510da18d225377f9. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82448385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74fe192f862f0164886bce0578ff9214cc01b6cbd6d3ca380cad009719c4eac. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEPI82448384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02152a77dc778f6e89a95fb9c427b26bb0bde59eaf6e875211f77ac1b7c003c. 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/DEPI82448381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a46794d2b90f557f560927152eaef94197613850d75838cec516ba178431b5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEPI82448383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c13c3f0cf91ca1264ae844e199ef086b203a2537209838a2d4fabc30ff9615. 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/DEPI82448900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6287de30e461e7dd8a4e32e070e29d6c3cedec2522faa04fcb898072747ebe4a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:48Z), 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/DEPI82448899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc04d85393c5858939df3786f939a848e26c594551e3545045965ad779f65114. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEPI82449154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2dc41237ad8485c2c176f32465bc427d42e43c993c1c27f6198f97ffb446f3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:17Z), 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/DEPI82449152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bf47d08c5c323f9353942292ebce5b05d7b19e55f3ae8e224c4e77cb4cfb53. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:44:01Z), 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/DEPI82449155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d901519a9c3a11a78755e65c54329f0a601e12724d31119e21d9505ebc8f1d. 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/DEPI82449153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4717b7f768a1268bff19399cda5d91723caa10f49328f0f642843d712ef552. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEPI82449388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d820883068ce8c7152cbb286fd095ee0516085fcdeae790295334ad92a3d5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEPI82449393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf942c8465ca4593223b70d31a7b0a611472e30af5b3e82a7a3d4525dee19ff3. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DEPI82449897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae836b9c9540adfcf5ebff53e18a2749f4df07cba3be0456b7c4c44ea425ec0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82449901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d60ead9a402abb217555207821b7e63df6f5d1655ddc352f3986e8d8469301. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DEPI82449898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e426ca7d4551206b3f96436b620891e4210bd9d768329884053bc9ce92e615. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:05Z), 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/DEPI82449907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270c00e821911e385716ea73141b914b24618c18522469eb413c71a50b50ed7b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEPI82449911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39265bf2add67bf4cccbddbbecdd4e9671e809176514dd9fedc79a7c67332720. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:29:23Z), 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/DEPI82449909.