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 0xac44c0ceb8991245e172a018c2471a9e1cd57e7737bd1d8c170a4d95b1a22426. 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/cbc2ea67-42ff-4fc9-a6ec-5f487aa5fe29.json and https://artists.proofprofile.net/proofs/artist/cbc2ea67-42ff-4fc9-a6ec-5f487aa5fe29.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 0x4541a7958e68f5550df7026e56d754a5609a8c7622815f5af49ffa463331e2da. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE6HN2300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa885c5c24cce26801d973388486e9bd1c1c98f757c1ab919236d1a842fee819d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHNB2093180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5df00c75f9212934a30b7b4df7c0b044ade3b5300be9f72bb2d6d782d6763. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:28:50Z), 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/SE6XW2299405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4372c9cbeb2e96145941b7b8a6687221986bf01620a04a516a5142aeadba3614. 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/QZFYZ2235024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33201642f051c04a0ad00fecaf80c6f055b6e9a715e67efc1abbda8764f0d146. 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/SE66N2210509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779797759849b0f79f59e165cda0c411b6060a79cd5fad10850044c92231b1fc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA72173145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddec9d7fb7d12b1f416d3406558a620abd0029160e3c45ce4ff9c9be6af2de82. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:33Z), 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/SE6SA2436034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4557c7077569beada24b133f08b2305c436b974b891009473106bfa55a977c3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2191824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93228ea8d7f15916363d1c6afdcd6618666bb227f75d7f178ca314b5889956e6. 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/QZES82247312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3be2dc360c5162fb21551903cac12e9bd85679fed16e861209426a513df9017. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:36:00Z), 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/SE6QE2327975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfe79297728ff371f695be5b994890927cbadab35368fa9d14a0677b4cc0e1c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/SE6XX2380332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb196ad09a866244fe48de4c8d5be770e4b2d7898ec2830066c8a6b14e6a865. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:29Z), 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/SE5BU2498805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbd71bdc8123b96ebc00c046c3e054b8f7e788c0d0941efd7071c365ba6dbf8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:29Z), 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/QZES92188602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe404a3d30844fabcd658cd7198cd97e2a299b3f625f7d6aa54853af0dcdaf5fc. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:30:00Z), 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/QZK6P2283991.