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 0x52ec53dc5fdb64762562eec933f752de5a25da04ffc9f50ea44b5259cdb60dc2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5000f54f-4c24-4a7a-b7ac-38bb222def0f.json and https://artists.proofprofile.net/proofs/artist/5000f54f-4c24-4a7a-b7ac-38bb222def0f.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 0x6f2b2983a6c86c01022b5eb627d74d7c19315081ab8a22a3554a2c141a91815f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USANG2247763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82628248695a1c0c532d4f761b8cf09576c703559b0e8370894db8cecfb277b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:52:56Z), 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/USANG2247764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb075f0e791cf347fc571067a47fb60fa091798ffbc28522a1f20cf4f89fb24. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USANG2247777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04093f32ff407a6d47ea5f09687bc5f4ec80de1ed7960a3150861679bdad42d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLM1988348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370344f7876fb1dacfa1d154036fa9a25596aa44bebc92c76ba4ae388c9c22e6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:23:30Z), 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/QZGLS2020923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcbf3b06378719a92514d86b4bfde9fa3cba255541ba98e2fe8038cda67b189. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:21:18Z), 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/QZHZ42062370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0c220cb15db86a118b0272f54db0569d7a6ebb1106f5cf0f6bb27baa92072c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM3DF2212044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3171c13179a1c3337086ee017ecb38260e86c8d8524a9f4668a1673747ffd6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2294319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5affc89622c52c5b3a97b92720d89b1a0dfc9dd374cd093e5ab1ef0829a7b. 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/QM3DF2216147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d38fa762ffaf6383c97530379106d405675286907f124c658c4d66b74f13bc9. 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/QM3DF2216158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd71320368ff63229972cb8e3034cfdf0286b35160a8a2a2de14a9bf165a59c8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:37:32Z), 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/BCT1H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3c13a85a9b8044118d2967a340fb61deb032c15d48e472c724e076730688ce. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF2448206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40519fee242d73c2c65bdc3ab115f8ec60ff9a5c9f1d1e01104f5d6838b9063. 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/US3DF2488460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eb516f53e71ff92c7ec1e04fad2ed996374f1cf0617ffea7c71b41235954dc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:41:32Z), 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/BCT1H2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513f2773278862420dd0d7798501119dc84dd61daec958d00baf8d26daf6675b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BCT1H2500003.