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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1649887f1a415f10a3b00bccfffac4db3c680e164d2919c170fca0768462759b. 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/e502f755-04aa-433e-8c21-beceebb92f14.json and https://artists.proofprofile.net/proofs/artist/e502f755-04aa-433e-8c21-beceebb92f14.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412695446db607d040fb0450dc969d0336c377e28edecfd4b1a12961bfb5aaaf. 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/FR10S1498075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3de0b9de120a70bcaa07b9ffedf1adfaceab73f1aebe0d93ebee9a54ad3298. 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/FR10S1498076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7358be1bc9a2ca9e03820fa36f0d3ca66fdb7384b2eb24d8d8d69f1cc2c4e5. 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/FR10S1498077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33778d064b6748f1a15cdcd072e62bc542e94a5de3861f4ca6b6dd9499ddd111. 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/FR10S1498078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b5b234756e17175ffff095df14d46832c85ba8ae3c39f296b742d1aeb7fa9b. 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/FR10S1498079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b717e8acf97d4b94ad053ed3e94d5cb1ad2c416768b787f7062c7313ad5e084. 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/FR10S1498080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab5660be979801851c182db3f8fc16ee475c02b3461e5b291fe3e9b73a1defb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR10S1498081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bba0a3a3e51730a1f85911e7fc6cd69154bce7650d830047a19ec07cd3c96aa. 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/FR10S1498082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd806f59fcea0b67e60c7d9518f2144976e813c53a2032ae57eaaee0c239c133c. 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/FR10S1498084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa52117889a28a3e4cd5315b2ff6485c822db613e9407b21190ba0ec42f8622. 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/FR10S1498085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb600b0a490f1b0bda153bdefb92c7a8a6c78f79be4a36fd145379ac80cf0124. 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/FR10S1498087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee9f9649577e03f2d974035120d6560fc8ae35179efb7fbb899ce66321d5758. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR10S1498088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7364e5dc76d2b83bfaf601aba549f32b172aeb492013aeba3ff0a2ecba7d4655. 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/FR10S1498089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe173e78bf91976422d204b979b261630bba27d5f90d767d737097590e99676d6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR10S1498090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e79e961e921c851fc04fbe3ac040073b2d8e50006548e37c4c67ee8f065dea8. 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/FR10S1498094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c990bc06617236fac086e7a918e2b45e268fdc79628e9de4281eb6ebf5673c7. 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/USPE09000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408f7e02e08478f718ffee253a574a7d6a546147f3694c582c1ccb3649dd2d6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USPE09000316.