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 0x18b0a0b7d649c947d811aa8db25b21b41db220f4b8363195239dfd15b19cd75a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8798ceac-1ad3-47d4-b204-e38589e9a22d.json and https://artists.proofprofile.net/proofs/artist/8798ceac-1ad3-47d4-b204-e38589e9a22d.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 0x3b636ce27e194cc2b60a4742c187b72ee19f70413d51e71ace28d8d1f6c8a065. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:01Z), 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/QZHN92236635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75306b94c8220518a319309df645b9b84fd5f334624cfde87fca9213c6634fa1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:23Z), 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/QZFYZ2223228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b7f0f0582604030e373292feac93d94321c9f10e201feea154d619bc57dbf8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB42269065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee7caef2e557c3ed85829d3e28cb515f813a9bdfc92ea3117f8b61cfbd942e. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZTB52258906.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0888a3d2de053a25518eceded32c144229e230824a382bc8142675562482d581. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWR2385286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845e9a16403695a7e7b127b44a5bfb7e94337afd96216efedcaf0227a0bdc1ea. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFS2328849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9ba5b4c29a96c22dfe1ad2e66e0d8ee90d13554cb8b45dad1e4646597eb91e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA52540979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f8ca8ace661383558ceb797f804a1bcd81ab380cef33fa88fbd6e4dd36bd92. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6Q2539825.