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 0xe50fd8cd32dcebc078a96592f323880839fd3bab5114d91b881eae4d79552739. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/167fa25f-96c5-43e1-a564-64863e0d895c.json and https://artists.proofprofile.net/proofs/artist/167fa25f-96c5-43e1-a564-64863e0d895c.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 0x7dcc38d8696ab6121ad3f376531c538eea789d94b9e090d79eca51afbbe2b995. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN62308490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc434355b0701d75d0d91fc46ec5daf2170879afe483e6cbad927b687af7b5370. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZHN62308494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7abea4d28eceae847c0a1dc0b9d9c331d2d54d316f194faa08213b7ddc4cd0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:11:13Z), 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/QZHN62308495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e2195cd957a3ea0a087d66cf4c726b925d116dd014f313fed2aeddc886bacc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN62308496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24559fe4cca18505613a81f53efef6305aac67cc814a6af1dfa50501b99cab1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN62308498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630dea7046eaeac4597fccd849306ae88ff45429545419d04e4745709f64ae80. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN62308500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb67162a11a1a84a3172bbff863b5f1c1792722bcf3d6cd2603999d3a15c2d2e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZHN62308502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9851a009f73b3d7d2377318a9011610161e3db3bee7d1744d5a3756e92c2f564. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWV2319633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea3f55830b2444a038d56ea9cfd5b08e222e957963896acc0a6322a1bdf2486. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:34:44Z), 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/QZNWV2319634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbfdcc9ccf71fe5cc1f6424bd29a001b1df18ffbe5dd23f7fab24402f1470f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWV2319635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373bfa00687475ca38a0c3c82e6e50734bbb40b482802584637802d946a0fe3b. 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/QZNWV2319636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8370252ee584f1aa091c64a9373b17298fadf5cec364415ecff6c29a0181f34e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWV2319637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ef9917a0650216950c762f991bfd7471ca5b77c044ebcc83e67c14024214d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWV2319638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dbad01d4e20dc4c2f5d9aea9327615a47ac25d2b15098265d824bccc5a2c24. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZNWV2319639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2baa8d820be68d46276f5d84fa3e682774a6fda2e463e94a53d5fb74bddd7b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWV2319640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a851057ea53b97f0c935e459c8449075e5bedb2ad9b7fff763fc5f1d05097b. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZNWV2319641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261e74472ae9cbcae6e14d29cb4a03dd6ff647a11ba22486c2239a32ff90ef1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWV2319644.