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 0xc2e63db73dbce22d70349fc35bb4c4fbd55d0f4829d7f62a9a83c7817e0dea35. 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/e6d90c2e-7aa0-49a5-b7ed-b79f8484280a.json and https://artists.proofprofile.net/proofs/artist/e6d90c2e-7aa0-49a5-b7ed-b79f8484280a.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 0x675e91c453a6ecf73064cf5e22b80fa28ed7f1eaf44fad240cc953c5842cda93. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QM4TW2079175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f965223316aafa388a1b3055ec5457a2af135aa94b9612832ca06cf92053b4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM6N22029233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f965223316aafa388a1b3055ec5457a2af135aa94b9612832ca06cf92053b4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QM6N22029233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a824ea38444ca607e20fc72fc3dd44083cac535115e8404fa94adcc4bda6ea. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:49Z), 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/GBKPL2151604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87453be6c78186e2181eeedc8cfd923b98af20a7aeb862f7d7dc3a1ea2bfd68c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBKPL2164275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897d07baa07e8c02682e7afe757741ef653c3e1cd8a5afd00b185c209d791889. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEXC82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f81ad5962c682625b115b31c70d600311a2ac1b628b9347a384512a3170d7b6. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QM6N22376554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c4de68a0ddff0c710fe6b57938a2213c0caaef52cfa72d04a8bcc9ac2d605. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM6N22376568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabe001fde1a1e6eb4c649e8802c909590cac0ee98c1d7f10ef7aff7e73bb23f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM6N22376586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6921ebb89a7cc2043807e42c3eb6949868b69c23e03789ba2382f62cc50f7be. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QM6N22376609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f62c718bea81e0e6cc8b6bf5e3820cf21dc000f6b14e6e5eaad7ebde3db141. 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/QM6N22307232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10126fa52806d94f0f889e70eaa32539e7b2e6109b747a7360884bdddfeb268. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:30Z), 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/USYBL2510507.