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 0x421704a4cd71a3b8d425c00be1e7316cc1fa766c28509a710a8d55ebf03bf564. 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/93a1fe42-746f-492a-8bf8-f4131d71ec69.json and https://artists.proofprofile.net/proofs/artist/93a1fe42-746f-492a-8bf8-f4131d71ec69.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 0xcb71cefb53691e08e91402443d19f66f8a92c5f6a099018200f56546c1944451. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZVEM2374635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe104df14d243c8753c8b8ffc1c29a4cbc19d457e68a7c101d0afefa8df629b40. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZVEM2396874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf421d7b722eabb8b59561a75a3d61c200d073efc4a2f3de2bfd203b4fcce5f. 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/QZPEW2476374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee28d62d7fde031bca274a24b2617ba0414dc207012da4456246fda9ed0af0c. 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/QZPEW2466296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5775fee22196a6ca5fbbe6405bd837ea2e5452b25262e397f7528b38768fc7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:46Z), 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/QZPEW2434252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe406c1c2b6601d6631bc4121789f1ed141b7813861e7323c0a33e03ae1718ac. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZPEW2456328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6e099c2bf158f79a057da8b459c49b0cf2dbdd5e1496d37fc3cf52c69092a0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPEW2496972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c97fbf7ca8756b9dba3dbbce7a07ded848ee4da063806db075181f24d412c0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMDA72407953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f52281fc21c6e2b0e9d5f16af47229a1d24472e973bf41f609ef36057147de. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6P42575389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ef0e8870b33302b79aebfcb81b9a07430888f9b1fd7675c15b72f5793f5dcb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P42570643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454f84b4fe67fb2c8be666f9a6058d225da3f414f632406f762bdccc93aa9d3b. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QM6P42570671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f52281fc21c6e2b0e9d5f16af47229a1d24472e973bf41f609ef36057147de. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM6P42575389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb872ff584e5e1cf3b6df2a30c36922ee8579961ba71ae1dc9d32d28ce8ec7827. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6P42570672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59ccaca492bebd60c06dab9a26f5c3f8ed9809f91e12c3ae3c21dbc70d17f61. 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/QM6P42570673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba62da69694a4c34074069992190bbc12f17efff2483b0497610e2d45f767a6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM7282558187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c97fbf7ca8756b9dba3dbbce7a07ded848ee4da063806db075181f24d412c0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:43:34Z), 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/QMDA72407953.