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 0xb9d49fe6727dc14c42ab79cebe6b212cfc6d16f1985f790121031921c6b5e70b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02f26b9c-3e08-4fb5-a352-90f53ea6a497.json and https://artists.proofprofile.net/proofs/artist/02f26b9c-3e08-4fb5-a352-90f53ea6a497.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 0xfe529025a487d9e9dab32211630093f10576e161070af6996fa28d5a0fa8221d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:42Z), 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/MX1082400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5132a39f255e610a04effe4c508e740f83bd082b1966e9c503966b987c0c7d8. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/MX1082400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b964d7f403f130da023a3cc1b99243274d9f5849c22be79eb8db8b7c9e3d00. 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/QZNJX2417986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185143922340d7635243fd7e94cfc2de12724a4e3a8dcd8cac233915b4d93917. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTPX2416944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda821f7ada97177a4e13a69965aa65791b11151b78a1855b81878aa64b1d26c9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZW9K2473980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6df886bdec85cc48e163647f287928a21bb344ce76335b1d735ffefe0e68253. 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/QM4TX2573669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e57d43f9ebdc7d70a98673750246c08458888af038109c9a0fdbde6b257031. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QM7282540402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6a7f83b7cf2b55c79ffbef93be4501fb1977b397225c94fb49aeeb738ab64e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMDA62515362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64044bc191442c42e98291c42ca8eab75a636f1cf044c4dbc727dda60d945b22. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QMDA72521946.