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 0x8dadc13a098806748cd82264c88c5df58108ade0c1d8067a914decb4f9a85dce. 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/b154d77b-a188-4c97-a041-6e75a72e0df8.json and https://artists.proofprofile.net/proofs/artist/b154d77b-a188-4c97-a041-6e75a72e0df8.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 0x3ee5032af4bf191f87492f7e57f5f1d543d85cd8f09d83b049c891aa5152385a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU4719960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb82c19bc25db665c60ab228f6e6f01a0dffbad7ce2adf2e2b8df368064ac2db. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/GBSMU5125873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecebfc669bbaf9a085f27d6e33a0b7d04c0b5c8ca4d5576ae8e9eb1907b0f5d9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBSMU6508112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b8c330ab47bd3b62c535058c4f7f0bfd64fc56ff49ae8297c39aa7b81bf0c. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZHNB1902449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9df59b59fe88aedf82f6ccfeb541007c8616639bc7b1b75bc66cef69a576c2d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNB1902450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6159419bf18f4da12e42a54a774b982f9234f41696d5609272c0435d1a67e55c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB1902453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22c4ec07bf4e57baa03dbf34046e95243dd4f7256bd411aab2b438ce82b9cd. 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/QZHNB1902455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693c7c8b2b98ea5e80d3e6acf42bb5bb2f61de791a31c95a7a7dccf3ac09f683. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHN32040189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59b79b21307b52021d51cbd16d88d6e7cfc5ee7cf1464b86fb1183dc96d2e1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:21:36Z), 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/QZMEP2000917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf626ef0900e6011e27937bb4c8955d25799f42e7708a4040fb5e2bff462e8e09. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZK6F2159922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef521314bac8d9c6fe6196410d20818f01a30708c82f0e9ef3498f447883ef0b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2236785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a894139d60d02cf002eaf22ed057a92704dbb08ac297ea2039337da45d18bb6. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/USANG2218820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79502f83ac32966bc0b924bea0f4dfb83cb6f16b8694cd63dd2b94a27902514. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USANG2293984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c31582270bbf3b94a0bc7e3d994ce3681753d98db7c01ed6a909d18610b7fc5. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:09Z), 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/QM3DF2241721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07de64103f8b1c0ab16cb9a926a39bb0715580ff82aabba95af1833d0eddbc60. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/US3DF2556439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e51e247d7c92c87a3696fa1570f4d61f97bb50286be0dd8797f6b77e4b80386. 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/QMFME2332955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e51e247d7c92c87a3696fa1570f4d61f97bb50286be0dd8797f6b77e4b80386. 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/QMFME2332955.