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 0x3da266f7e03ae87f737fda899649964c0ce374f58bf0135c65df1a87db7411ab. 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/0bf0af45-8a67-475f-84b1-b51bdfc2047d.json and https://artists.proofprofile.net/proofs/artist/0bf0af45-8a67-475f-84b1-b51bdfc2047d.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 0xf35c93e91a1da06fd88f746b063d3ed1f065055b096d6e1a044101a58c10a73a. 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/QZFZ72525583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8156e9851ed7fae8d360ef61f99fdfdedd4fc501a9d5efba030dda7fa20aa6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ72525584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f0af58e0cc75037e763f10f35720d41307cf793d26bb3508f2ed6785b28837. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ72525585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe286e479dccec2b850451bdc2ae470275dd8634e4dd37cd3bbd3b7cc7f17ed4c. 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/QT3EY2427780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f494942a58a17284af61055b8b906d4be5fb1ba8c161dce922634292df915c. 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/QZFZ72525586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe286e479dccec2b850451bdc2ae470275dd8634e4dd37cd3bbd3b7cc7f17ed4c. 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/QT3EY2427780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39d02e7c4ad345f1a927f6bcde842ffa60bdcf287a130a9df27617bb22244ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFM2472780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffec813c8285cbdfd3c8ccdb2d540f969288345e3880835fe81fdc19912d43ed. 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/QZNWV2428556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dbfcfe1ec26764fa6c856e6d4408157a7fadc4344c7768b524dcc861c92297. 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/QZMEM2408355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf22c87ac78e87192860643853902cb17242ce3cad48060315745a33e47d75f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72400806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fe26932db02ddb5bec6a55d068431cac63b2133661a93f6e31ed14154dc62e. 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/QZDA82406322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf057725ad7d4f26165c3356de0e0bd74b95ae76f2c10199dc41cef5d00783270. 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/QZFZ22484023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28fff6374f6e93aedb56fbc6cf499425bb90ea94b8016c3d62c945f967daeef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFQ2340939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29560a9ffc5c48f9527552bcc25609ee1ebf5794fa8274fe17dba0194a2c584. 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/QZWFJ2362040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67096df0803ba204500ac17bf851823e5d99dcaeb203361dbdf13b00f9e3f18d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTBE2314690.