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 0x8a8b5819a4a68840d159fbe46a11f8cad2c0084a5258762da80945506ceff46c. 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/9d04b4fa-d854-45a9-b20b-057e0a5aa809.json and https://artists.proofprofile.net/proofs/artist/9d04b4fa-d854-45a9-b20b-057e0a5aa809.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 0xb8da011371b7e7ecbf8d959cb2ded6907354d1a71b9bf0ed50db226bea2802a3. 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/FIABY1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291132a329499f72a2b9151a77661a34d2cf16e0db6a0caf79b836832baef92. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FIABY1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddaf81d82d7878accad09b1eb97607addaa30d29722f2a31fd3cbf1f82840a4. 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/FIABY1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc91f261afc4abe9e96a1515da778c74fc7fcdec7f23eea93fc366a4a5e8b56. 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/FIBAR2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd126bfab7d0cfabaeefa7d27cbb14dcdabe4d9c31f2e56b9f9a0d930cba2e9d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIBAR2100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc91f261afc4abe9e96a1515da778c74fc7fcdec7f23eea93fc366a4a5e8b56. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIBAR2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ef684bb4fa7629d9400e8855ef649e11ddd2da64d58be1d0be405e190c539d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FIBAR2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041918b353bed6ce0dd597dbdb1359cd6fb8981d6b721d6ed7f75afb5e316ec6. 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/FIBAR2100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4d4a8a1f2d20eb493f3a9a07c535c4bb4790a32147f4e4500041896afa9c37. 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/FIBAR2100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33457f1d3029b17e71fcdeaafcee78a95f8f389925bfef45738610b43eb79602. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FIBAR2100249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf075b736a5ee0e505b0b32986fd878abf24315b1a2c0020675891ae5a904154a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FIBAR2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45880db217e7f78ee115ac3867dd41c7f27b83ed876034c3cc95693664012bc6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FIBAR2300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472ee9958c7c073bf02f1efe74b083c95874929d3e7b9e235cb3e724f52cb89. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNWS2447215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb7eb5582c7ea67b03371bf3e309f911d5cf285d2d59750d8fb4393f802ac5f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:51Z), 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/QZNWX2407766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efa6fcd1f623d1f2fee1f4affa36f1cdad83adb42b85510318090123cc8bd13. 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/QZTB32434690.