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 0x4ead533ab2a8ba0275fb284ff20fb1d113203d74846b9ecf309b4cdabfc7201d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46aab32b-7573-43a4-ab70-c4ef4da806b8.json and https://artists.proofprofile.net/proofs/artist/46aab32b-7573-43a4-ab70-c4ef4da806b8.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 0x266d13563ec87c53d70fdec3b9570e1af25cfee5b5b2eeb24d56916728b2afae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ432307701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01025eb451a9160d8336f66137c485d4cd22ef72e1706690e8e56e7a9a2151bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ432307699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65bb5b31a97d90676fc7ac3c153da619be244f3800544fcf6f4bbeaa160146. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ432307705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fc7dedee48d515a2f7e6d6386a862312459e38ac7d59e14d953472d70bd93f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ432307700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b204378ab33ebe6f40d6719a795d30a78ba1fa07623e063a8661c860e85c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZ432307215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc474cbee5ee5ce4c0aef16e18a3615485462819e0877e09e269b396d75740. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ432307211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8cbddb22493771996f7dfea308d59f17758a22a5b9cc7d9ba57a09a57b9ba2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZZ432307209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaaa222aeb2976890aaaa2bceab3566ce7b79c88c0497872bff4663a220594e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/INL412400531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d724ca30ea59bfbfd89dbf982057d71eb013e8bb397587edf903c443a48fcd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/INL412400530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a61bbca86dead91909b9310256ae1d5ccde7317338c9d5b7576f064c20dc4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INL412400528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79359aa7dde51c2d91efd929fa5a0359cb4d18e6badfe24d352a0813dfac922d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INL412400527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b560e65e868dc6577aa1c5953b7c68db11fd9cf64d30eb6c1e0025906e4b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INL412400526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971bdc6e318fc47e40f189e4f81232a046671a71091b027153b786b898d0f2e3. 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/INL412400525.