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 0x3c4fe8b86b992bae92c5af607a91fc3a6d5af552547689e5e14d642e5b271494. 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/7e039ee3-9985-467e-97cb-b7cfaf1d5feb.json and https://artists.proofprofile.net/proofs/artist/7e039ee3-9985-467e-97cb-b7cfaf1d5feb.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 0x0b444ab4a7ffe47d50f9a9caecbb87c7b0f23739375bdf3dc6b238cb07561d83. 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/BX8C52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f920d1daf49f7713207e2ac73df4bb43079737081eeecf789f82c5d81cbcc. 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/QZNWW2401961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9293c8c715108b243142bd1a0f92ee92e5e2d3b26f6332fdd4127a37d45dc97. 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/TCAHT2499962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb473451927db7b859eaf8d6f8563f505176e7a9a1ec19e8a496102851c0e311. 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/QZWFE2365735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91010d27084642594397e6688c3b28b6d751127a2b007cddf9c2fa8cdc98ca34. 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/QZTBE2311714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40706c6149440f329c70d6cab38485f2cb8282dd7ca66fa9f22203bf3d462be3. 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/UKXN22355510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2859b51cc9b6a9047c25639945772394bc3b31ca44d66d3d1933a9e6587c4. 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/QZMZ92227233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87256f733096d6198ec35abb03de68297845df3ce5de0d14578ed9eaeb07eb31. 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/QZDA42270032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012713365a93702cbd1adb732cb6d3e5b03af878a6a3b01335fc7061501bb7c2. 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/GX53U2031790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1477b267d407120c07db5e066f662383f1cdbc8e04b3abbcd28de8f5b377b00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWX2190152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba36853be3a56e9721ea47e3e3089ad4a3a5fd12546c24a8e8e74d99e8902a7. 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/UKXN22138284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01757e1319e998a233539384d7bd12c81df03430241913f160f863dfb196c5bd. 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/TCAFK2143850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c108a714c1f6088a8b29748c6d2253e77f735d5ac749e5fbcaf2204ffc7bb. 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/QZFZ22156538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44198cb9a7b73846ea53ace99bc168acdc648bf8fa8957e8ae67b28155e8c776. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6H2088509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a05c63e901a52690c2bf8b1f139c4fbf4df6df00f472e5b30e25b306482ee8. 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/FR96X2085827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c303e4baeefd30b449d45540a15d0ae95e127223d0fb6065c0dc3400dd1b7d6. 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/QZHN91988504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694f63366a231d129d4a4886843453e52bb520a74006f31ac9bdcce4ded26dea. 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/GB2DY1900500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5540ef08b68575f6732529363326ec0295f535f47cc03c5824be4686d140dbd8. 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/QZFZ52067759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5478cac95a4740c3d69d9749e58a8f75c4e2737b34d81a75e880685e83e6c259. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ52050085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3920f0c742d33abbc38775e9d6c48ca255567bc26240a2506d862ca2d24965. 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/GB7TP1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b444ab4a7ffe47d50f9a9caecbb87c7b0f23739375bdf3dc6b238cb07561d83. 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/BX8C52400005.