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 0x259a56adf818d8ac4f5c40e9b74b00c78455bd9bd0645a65cbca5c11224f487a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/baa76af0-b038-4381-bd43-de347cc872e2.json and https://artists.proofprofile.net/proofs/artist/baa76af0-b038-4381-bd43-de347cc872e2.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 0xb7da28b94bb8fb3046d260d1a2a33471875ea904354f963b8aba512044a95dae. 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/QZMEP2317981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e6e7e31beec194aba9c2a0e1dfc7fa84ea634415c3d295205f4c93644ce91f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTB62323142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb481e16d4b794bff6aa393795a51b5c1aa71841564c944a5a1210600e9a1fe9c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTBA2391778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb1fcfbe57c95666706e0c884362cb8014b4d85d041b7e5ac0ec20b409b0b6f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:06Z), 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/QZWFM2327225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d51225b5633d1cb38ab94035cf1ea8a911ae3cc2386ea1488150c5e17e7a0f5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES72411740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ab60d1c3af1eeb7ef25eef0f24ff69085bc26094857f280b85057210558781. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWX2418006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a882a031806953d06a4d9d6aa2d23502cf372a2d1ceaaa914590e8910a81a83. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:58:55Z), 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/QZTB42417106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158852d730bfae3dea5c6c6bc6d9e96658c8863cc7cf5e9869f92a0d4587f04. 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/QZWFT2453991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2256087fe706fbf4b2ddefaada5234d363d8f4e20cc341c49ebf8ba2441d094a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:22Z), 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/QT3EY2403975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa2f6873b9918aaa6c0633fdfc27e8ecf67ecd9f0d3ef8c7a237ca3cc5400fe. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFG2565897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805b482471511eb320388ffeb0eac10b1df86173234dfbefb091b3b919fdbdeb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7Q2597077.