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 0xf469ed7b948ad2f94a99ba0b7f65cec1d8b1542e06947885f00a3a9a21274db1. 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/00e8c887-24c4-4e25-a5a1-72d93a07a8d7.json and https://artists.proofprofile.net/proofs/artist/00e8c887-24c4-4e25-a5a1-72d93a07a8d7.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 0x18356f584c5636df0268673b3ea178a7858ba1786c3733d6be65961bb485e5d9. 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/USA2P2108692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4273de4ea536035fcdcfb3441dcbc36cf9498724c337d13d8c6ee475ad1e83. 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/USA2P2134992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0b8716b12881232a427db73b15718b30cca6a58c296562b43f4e79ab32c89d. 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/USA2P2158115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb492f74bfc605a3cf8c674075e969f05186e64ca271f7d0f85ea90e4ca3d1b9b. 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/USA2P2229036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f952c8f49ac07df3348a95756d76b48c8f1fa0a128117a4588822d5e8f253cc. 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/USA2P2134993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71094455b8ab23c76d7d40368f7619c8a668c59be96b2b320265f24421d42d9. 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/USA2P2115487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a7af53915a094e9788b36ee99f5ce5bff6ca80b0c7868c89db9c82aa7fcfe. 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/USA2P2226721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef22d3d52866dc6f42f6be19b65a5b540df23ba7c5236ae3f8a83b93422ace9. 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/USA2P2134994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1df8683d1171b1d7ce58c5b3d92048c8ebf92d42b6f42423b39942455c586. 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/USA2P2115486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a325eb3283e70fc0cdc94135d2be15302a25b9bd99bcdc0cd790540a4a3f67. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P2221609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421f23f38fe83bff70baa3c6d8cbd67fbdfc5e5876a38b0353156e243293364. 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/USA2P2108690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d2d88ae43296ab709ad7f40279d634691cdc6c0a45ad32316116db6182033. 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/USA2P2134991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1735a56ddd65a8afa8ae545f6fc4edbd296d5efe3b347c949b282386226ea73. 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/USA2P2147383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2cfbf9bc2a7f140f07f095ff2d59c020d9f317f6fe72ca943fde9086de0e89. 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/USA2P2115488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0e5944e1e5fa9d694172375f061e7cd4b273d4e21c568eb6da706faeecf0ef. 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/USA2P2108693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35038843c715ec1d3ed264e8100bc278b24484100432d8b1177d02fd49f223c. 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/USA2P2108691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1951ca15a345ff9db02e42df7ca39f39e934174ec97c0f86bdc9e7d2edd140cb. 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/USA2P2115485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b01065a7a4c1e58fe64b73b4d66ddcb53edcf773ceb2a951a39c48fe002ac8. 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/QZFYX2412685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944e2274f274eb96766854625513a9991da9314d85d48aeab37698c528186162. 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/AUGBT2312343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a7af53915a094e9788b36ee99f5ce5bff6ca80b0c7868c89db9c82aa7fcfe. 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/USA2P2226721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a325eb3283e70fc0cdc94135d2be15302a25b9bd99bcdc0cd790540a4a3f67. 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/USA2P2221609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1735a56ddd65a8afa8ae545f6fc4edbd296d5efe3b347c949b282386226ea73. 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/USA2P2147383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4273de4ea536035fcdcfb3441dcbc36cf9498724c337d13d8c6ee475ad1e83. 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/USA2P2134992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef22d3d52866dc6f42f6be19b65a5b540df23ba7c5236ae3f8a83b93422ace9. 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/USA2P2134994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d2d88ae43296ab709ad7f40279d634691cdc6c0a45ad32316116db6182033. 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/USA2P2134991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f952c8f49ac07df3348a95756d76b48c8f1fa0a128117a4588822d5e8f253cc. 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/USA2P2134993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1df8683d1171b1d7ce58c5b3d92048c8ebf92d42b6f42423b39942455c586. 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/USA2P2115486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1951ca15a345ff9db02e42df7ca39f39e934174ec97c0f86bdc9e7d2edd140cb. 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/USA2P2115485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71094455b8ab23c76d7d40368f7619c8a668c59be96b2b320265f24421d42d9. 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/USA2P2115487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18356f584c5636df0268673b3ea178a7858ba1786c3733d6be65961bb485e5d9. 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/USA2P2108692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421f23f38fe83bff70baa3c6d8cbd67fbdfc5e5876a38b0353156e243293364. 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/USA2P2108690.