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 0x5267c478fe6feab578fe93188d83eb7aff72f53b7ca9a64cdbbe22bbe885d16b. 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/636a2d7e-eec9-4316-b189-a8ee31ef24e6.json and https://artists.proofprofile.net/proofs/artist/636a2d7e-eec9-4316-b189-a8ee31ef24e6.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 0x4e165c3327eac650e8e6fd78e18cef15aa9b7354d0d2ae4a552c63607b7153a2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAT2271137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca61bb6b5a53d5e52f196995d299de06a9d5d2cfbce0053240f5bb30bc968fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBA2263640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2083ee76372762d518c1a1900d607e3072c35a03cb9a9b62575418c4510c8ae. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBA2268337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d5e7b708af188bc60e65b1940da6d09df175b5d1303d4fffd483fada89225f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:23:05Z), 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/QZTBA2265917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd874f696b90cc1f0d4ef4d49bba4675008e3c0e5b8685eb6538149be551b5fb. 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/QZK6L2373879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff7aa502b27b197e61bf399d5f71214b19bb4ae68882820703e736fdacf1b17. 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/QZHNA2543028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaca5f649623314df0798455a311632e8f7bea47f91dfbc0002a54e1be510b9d. 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/QZHNA2543029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed8d0d8f702dbd076e15178bea3597b81add4510e0b349c71099ab2d184e97e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:42Z), 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/QZHNA2543030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c47e38249115456d68124985511ebfa414ab12cc85d1cb5b1140ad7102cb2bf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNA2543031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a9eb58c750d3113041a8cb1cb52021fa2d880d94bbea800f134f57af3bacf. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZHNA2543032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb122435ec3e5bc2ad8ec523557007820f2a1f77aa4364b388825e36fa723a4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNA2543033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7955ad327e657c90ffd1feb307e50ba946c0963888f1e0431ebeac7502355f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHNA2543034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a083f469930aa8b07ea927996e9084e248af1d8cd3ecee6e2b0abf8b6b0c0e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNA2543035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5cea5c945809ea234df9857cd4ef084d6a99b546be3497cf5e489e64050136. 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/QZHNA2543036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c090e3bae5ae9b167d366c182598010de6f525008aa8bef58ca0cc6b706526. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNA2543037.