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 0x388494a4e6fa6f6e94e0a894cbac2590ac4e83af6f84a6ced0b8b109bb8a46f0. 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/df723c99-be1a-48a8-b035-34361c2dcc1e.json and https://artists.proofprofile.net/proofs/artist/df723c99-be1a-48a8-b035-34361c2dcc1e.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 0xb7cd6ec7c5797077bf41750d7226711f294f3134e9497f7a7f853f5a77211c48. 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/USUYG1053951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe414a30e912f4b9675b8b337cd0bd18778fa0bab893c2654f0cb18bc9328d530. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/CA5KR1935383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb58542e2a05707a689dd6b453ce7b3c25b616c944a6fc7580ec4b72c6ba62a2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CA5KR1942867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd22489d918b847fd4e7f55f16f982dd3cab21463298649a89b23dc851d34b4. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/CA5KR1942868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ffe3ac5f16fa32587173d434ed51e6249a53dc9f6a5e3e95ddcdd14d5dd3f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2224617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1aeb7a0ac1ce8bebe4f24d33aea29ed795b2052b92cef3fa85987bf5b247ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2237026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5535d611de3d05f0339d1e09da4e3668ccc011f5a05b6981babe5e671844217b. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZTV32246386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd81382e67f18b60bb6a0ca19b1b01ace9abbedcf241a6f8aa8bbc60f9d99404. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/CAUM82300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caf0fd9f198a6fc5df723a25cfe55de283f7611c418a359e3808c499d4e562a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWDD2357746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7387493915b52fa941cbe9926b4068a6394c80c05dc96c5036a0f9e23809eefd. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:01:00Z), 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/QZWDD2357747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2f243f54ba1f5e650bd2df867f02727da56252babf7428107fa76cd8db6d9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ8B2430242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1001fc1746ee7db3eeb887afa28b4e0b18f721e09c5853337ae104f73b9f84. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ8B2430486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a27518c238b2200ea542ae4690bbb9d4c252c82a05929c623a1c3841dde73a5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USQY51607169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe234bbd8d34d266ec831f2b646ef14c376e69f3c4263eb643bba6b940fd5ec. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/GBKQU2531510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b9a9edf09243b12857add011122e14e3ece4da42a8540813045b6bbb227578. 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/QZWDE2257135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fd132e2be9d1494bdcd584f618a8cf41a2fb86ba115dfec83bb1a07fb281e8. 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/CA5KR1837937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d251459d0b4383a60e14f4cce1ba3d0733bba2bd9758bc169451db070b96949. 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/CA5KR1561046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecbd032aeef929074db6cc777b23491c8ddc291d23ca8380c0671815703b824. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2230112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38b03c7a6e1e15b84c0b2af0d8ffdce8b5d4d5cf240fd1cb1f5c9822a3d0b04. 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/QZ5FN2419853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9688a4c05dd59157f3c3c655735549fd446538a2d79bca96f2108ffd733c30. 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/QZZ8A2339546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036481ac55521da8ab3824ecb1fdc55a584189b2179502128be994f9f273132e. 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/QZZ8A2339562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510031932dde2e248f1e77febee0aacd768874a391dfc1e8c699ad51a727cb0d. 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/USZXT2556509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488b4cc44f2fcd426fdd4c7e7ffc15a7809b970483c8ba3f9f8b8a3e87d37a49. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:05Z), 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/CA5KR1805180.
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 0x47eb43273a363de2093e8785434cb4214ee354ede3826612166c1a2654a7861f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CAUM81700151.