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 0x34c12de88fb26889b95757ba24a6beac7be0961f4ac7a8fe5086d77339ddedbb. 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/62d34c4f-21f0-4bf4-b994-124d51ccf9f7.json and https://artists.proofprofile.net/proofs/artist/62d34c4f-21f0-4bf4-b994-124d51ccf9f7.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 0x08ef30c3863a50ea7e8b0c10651aff44b69bc24cb27e7ed6847b149e48bbbc6c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZHN52194145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d779348dc9850983127db6f5ad3486970961bae2430b10166d6652dc014e87. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMER2185355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3552a698941d6c712b1daac7069d09fe9544ab29ba247840390c133b3316c6f4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN82276861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2f24b07f1420dab8bbca972f2ab5fb1960f1d14eaf6ace42d656b30eab262f. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZHN82276862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc239dbf4e60afaedac21828435682defe70ac640ed0937e29ceb0fa12dd71. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWR2210229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eef7ec3787aa8df3e4c7e9f96d1c0bbdb2219719a827c2945b3217e66d8874. 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/QZTAZ2239225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11721d7c483d7a02f610ca584214868e9031c57d5a4e2241838380d1807a8bc4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92357410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd311912826ed769a3a5a2438e1589323887e0600b4fe4a2eda43ef662db9e760. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:43Z), 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/QZK6J2345779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7a74344dbfd252e29c9efcb9eeced1788ef21fcf670b56e46459e1048830ae. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:25Z), 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/QZTAZ2359534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8742e22d787c5970d7eca01c652be73953d3e391c881e265f7591c7887e91ebc. 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/QZDA62485641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f9a4ed6644e38153064b4316bd8bff31252a62eca83f0428f729bcd113fe5b. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZTB92388665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663cc171c3ffb496940686e938b72f7e9bdc87e59f6e1a7efb79a8048424275. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA62485642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76488124a5a8ff8b891044ccfd879f9684ec032c61c8ec3c5afaeb2b6ab23d9b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:36:53Z), 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/QZDA62485643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe84964d4ba3688fcea92c6f126425c65e447d4a089ba179c68eb62708e2101. 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/QZDA62485645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d639d38689ff46348f41dd9d1d06cd5ec3c7ea710c14343fb4e1acdfeaef85a. 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/QZWFP2346404.