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 0xce8936fd4bbec8c42219c4538607a08e4af5f05a429abe2f95e6c269977c74bb. 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/85777d10-3582-43d0-a9ee-59615f1fad4c.json and https://artists.proofprofile.net/proofs/artist/85777d10-3582-43d0-a9ee-59615f1fad4c.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 0x2971117d671f22d09fa01ec57817c4dd6d7abcb78f233f461ff7138e6f23617c. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZHN61988228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9fc5c945057ef61d41c1ca1f3d4a3d773d1a13850a6676e97f01ec0062ba6e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN61988229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf48538a0ff08b0512c8a70f4fdda40576084858addebf820783522f498aebe. 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/QZFZ42043774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2227c8c43f1388b869fd1e402ec8763e7cad4e1eb2af108584889be717dc1d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:31Z), 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/QZFZ42043776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ce2e81b43c6282d871c5a000547e5228243bd916c619191cfa2874b6c1f72c. 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/QZFZ42043777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee213947ce4632c29ce4ba62282dfb3cc7502da0eb5ebfa85b5ecd43a23221. 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/QZFZ42043779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e7b0c3f2811c1d938b496499a58f3d6da7a0097d50d4e2c2a3893713a19cdb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:57Z), 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/QMBZ92018800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb22cf8d4ec15d7b6515089088667dc23115083019e9c1d27a24e2b55ce3b0da. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMBZ92018795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f04930d9d1277fdbd0d623027c7301a4cbd3426ce962f546fbed1155fa6622. 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/QMBZ92018794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb22cf8d4ec15d7b6515089088667dc23115083019e9c1d27a24e2b55ce3b0da. 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/QMBZ92018795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e7b0c3f2811c1d938b496499a58f3d6da7a0097d50d4e2c2a3893713a19cdb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMBZ92018800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17619c4f7a8e0912d32842da0d7270be4ea55bcdec411b3dc3c824b9e7a2f409. 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/QMFMF2024937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd307f8102c9149f2068f3846379a8b1c1b54828eb77c0ea4f835a2105c7a446c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM6N22129523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a96d3d594a3863284e6d93eb30f13686fc56d85dd1a3732aae5d8081cc3a72. 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/QMDA72159137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7b34b6be1cf421f9f5e63f18d9fa5aa8786274b66f5f6944d086f7848dfcdb. 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/QM4TW2301532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd235ea248eb4a74edf2aa2845c2948ab7b1612d9e20f251ce7b87d1a246dce. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMFMF2305020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e82522866f823fb482fe2ef840e298eb4d0538ae867b5d77521df22d8d6ead. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMFMF2387427.