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 0xdf246c57290b96175c6f2ecfe24c2ddfb416707b38a6a429639bdddb10d04228. 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/a83e6379-d99a-4b91-9d6a-2297fbd58006.json and https://artists.proofprofile.net/proofs/artist/a83e6379-d99a-4b91-9d6a-2297fbd58006.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 0x6783cbd8dc516bd8781e58baded1ca529a8a41ecdc0588b2af081b6b8e3f0c41. 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/BXPU72000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54911c83efdaa834901fd512de01b1897768943ccdd611111b97a77338db2773. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXPU72100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123344d64d65aa2a67c1b6a3d8d925d9035bb51318144c0772a0082ab9c060b5. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRZQG2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd25bdc64200b6b36631e0d682e5cceccd2efaaf3bcb21802cc2ea2a27dc0a18. 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/QZNJV2323776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6ff311d6991fb73610b43e4b054d78d8285bb57a9e4021bf0947c829ef8be5. 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/QZNJV2323779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae95cc9b0723d7ce3d82d2ee108ced69d04dd047e4ab31ca06235cb7b019de3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9M2377411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c51e27c6a9961d55a77f759f1fb4e5bced2e10468fa83ecd5e9d038dae012c5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:46Z), 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/QZW9M2377412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12deb8f98ade6c6704d934299abf016822094e0b07904a5412c5a8a68a4cc263. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9M2377413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ea14e6cd8cfd9725537a1ac83c972c2c0cabe11067e5dbd9b8374df9ccce96. 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/QZW9M2377414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208a7508ea26ca0f519c1eea702c1e13e5d5eee440877231b2eacbe7eb9ada8a. 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/QZW9M2377415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231e5ca7e58dbeb2caea5a027872f5208118433c86c82fcec766764f9f01e5f7. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZW9M2377416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9adf72bd48a71e1962f74853f84e0d5f679e840b4320ea019ebcbdcb62a3dc. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNJX2476249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800b1a0ab0fb59dc705bda615c10a8bafd601b97cc06305a1b71d8eaa83d5212. 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/QZNJX2476250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8612f885423b49a32fc09924f89c8e37683e149599969363a06239ba271a647. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:32:55Z), 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/QZNJX2476251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37ff131151dfec756d53c010a96f82d81c7568bda8fe9061fe16460396a7b85. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZW9K2411867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5385d6291150515ecda26bd6607c4854e9871d990c7e1c2fd1d3ac071c2ceb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92045661.