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 0xc26a5a4e03f704f2a3ac78080577ac38295e4495967ce5ee0b7ee4eb73b95d11. 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/d02a2e0b-8a76-4e00-8ac7-fb818c83f174.json and https://artists.proofprofile.net/proofs/artist/d02a2e0b-8a76-4e00-8ac7-fb818c83f174.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 0xa6b411fbe294beebf3d34408c068d6aca8f86f637758cf9886899e2502cdd154. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CZCZ42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4d5a7ab018af1567a380525fded6586b3f675c9858be72f29ac12d41d12cd4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CZCZ42300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22f5a469917632a92910e3aaf5011cd27bd1c8e65d4cff9be6485d773fcda3. 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/CZCZ42400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84c483ec57690ad2633627de55b2318d9cdcd73eefea043096c4d64faf45e3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZCZ42400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431ec9cf6154fc52053180d0b52aeeafdc53511b9e58f970a4fc6725ffede8ab. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CZCZ42400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb336813ee637115b9e818714b4ff8bf366d810d1e9fc0e722c7f9953e85e21. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:21:00Z), 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/CZCZ42400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dcbe057529b9241a7939a4ad1fc9794e57bf3d6929d1be91fcc8578bc5d055. 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/CZCZ42400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa209358843823b0b5dbfd73a06213999fde35e78cf50396330e24d018fec7d92. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZCZ42400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddef3195e8f7caea5a4855a6115dd555279202e665d0e7e2de465807ab1f4ae. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/CZCZ42400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003f249b2c5d843b57f16a214eb6db65b1f25d1ff060f7209728de4685e59cf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZCZ42400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd01533dab6199790ef70235bbbd5d1e8b7002ff89c91b350d93419519f1c465. 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/CZCZ42400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80846e02b50f8af6c228ccc8a3c4d6dee5d027303c50a65b197135a881cf8489. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CZCZ42400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa1bca3476487156df74eb49ee351177f903433f551e30970c0a23d43bf778b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/CZCZ42400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704066d8550dafccde85493b1a898e15466704889ea81f8015ac52978020e1e7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CZCZ42400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168729495f056d0e25d20e929ac77a77cb449ee339ea62cc745ba27713268b6b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CZCZ42400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69c24f56df8150ec9a2fca15d010b380e4c7bf8d9b67d22d6e2b4f8bcf73bc1. 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/CZCZ42400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645bd6e53971bd09a0081630f489e73b0d53137f67fcf68096b03dbbb98ec631. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZCZ42400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa27c607f8d77bb945ebd930a6448908a01ffd556f5b9f131e17b416d00267f. 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/SKA012300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8dd5aa46920946b1b5a84534d6a47e1c1cebc8723eaa06ad416c3f4fa0b9f6. 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/CZUM72100935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a191b93b6bb1ab5615228d73c47a17db094c8a1fe4ceb4592456124a6a1111. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZH442400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8b05ac1a984e255f2abac92af5d8d7d836eab78a351110fb00adb82818640a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZUM72301009.
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 0x2383a145884985d3fbe02fdd72f258e79a855b08727c5c0f19be831f4a527078. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CZUM72301013.