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 0x28936bc3b89ac6a6683f02bd73bfaa857c9a59145375c29d6f2ffc3009af985d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/614b4b88-e484-46d2-9c45-307c6c427b55.json and https://artists.proofprofile.net/proofs/artist/614b4b88-e484-46d2-9c45-307c6c427b55.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 0x39f0c9f5e61eab2ff32c6c25e8d74fe2a3464669c19155a2107755e96ce9a223. 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/QZMEM2073789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2953e66c797ab358f0f8042b21d06010056dc8615d5dc087d6dfc306524fbcad. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWX2088824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa04bec4fff8f7bc848184297c9690ce1446bb684605da5f7d2e5b784876a42. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ972493250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d166e393ded3628ea939853228e094518855b68bbdb14a59ee094fa8a8dfae. 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/QZWDW2491385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525a4458e50385eeced1e2afb8b96036525c3e98b48af80ce83fdf5778f8afc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882419115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9221c5a18059f995ede15f9a88717e915eae57854c2e870b45884af04cbb1902. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:41:10Z), 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/QZN882430291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea6c64eae0106c6832ad8f33bdd5dc903a0fea3ba65cf9485486444b3b8154. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZN882440857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c276c0ca158d1783465cf972137dd9494dd3bbc8353502ebc2c7b824c47dfd1. 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/QZN882509944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39bab07929725167b88dfd417dae205e676d8c92423c2acdb0a7b1bcd8d104f. 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/QZN882532631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa74a59083107afd997da8edd6f98d8724f7531fc6fb72d26bb094efae0deb4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZN882549018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c80da67463934cf95c032490d1e2bf910745fdbd7f04f75159ec839b7d5721. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWDW2550698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98116a3ba104cd71718d4eeee24da69e602f01ba3320cc775c23bdcd65a5dab9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:17Z), 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/QZWDW2565481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41137dddabf64f5a2cd8633329c17ed1b95a644a2eb93a8541837a1cfdca2eed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZYFZ2500496.