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 0xfa0c81464539a9aa1d6fdb78e8c18b89c67d49437e9663c8a1948efd5c4d5bd9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e546a71e-88d0-4e5f-858c-b0d6636c1b45.json and https://artists.proofprofile.net/proofs/artist/e546a71e-88d0-4e5f-858c-b0d6636c1b45.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 0xfcc23be96a2fdb1c8f2c5702a36e036a124a2743001c7bd2fc6340c00794240a. 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/USTC30749058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7537b37dfc7c042616a40294d0f0b299f66214448f6192351105b2895312e2b9. 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/TCAAY1114451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd928fd2df7a80f582f681e83c9e331cec57399af90b2b0b7ec383600901f048. 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/TCAAY1114490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4437b32a01413577ef8b3a0f8dd433ddff643e020b79d69fc520cf0220d3710. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAAY1114639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16798ec03c10557e5d864457a1f3007c33472c4962910225345a6af7460d9c60. 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/TCAAY1114651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f316197f1a451e87d09aa374d9310bf1487b7623a527c8d762e949571f5df56. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:46:44Z), 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/TCABH1238646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f6511d3860fa242cb65f81e627cdd0a43e36431e645197b8175f532e8d23b8. 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/TCABH1238657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804b9ff044aa748c60f1a431d0aeb3a05cea85204cc31abb51212b224746ff1. 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/TCABH1238659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2910789cf8087b6ad225f9679e5846e732762d6c5352f04bb406e605609fbb97. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:39:59Z), 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/TCABH1238667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea47a2a7cea6c1f65a90e5bd3a0cb5aa594997beb67828ad71cefcae285f8105. 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/TCABY1484882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c74d7b3098b4b6e704eaea221a192fec424536e767ce3661a40ddf960a78d82. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:13:50Z), 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/TCABY1484885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd6a03f45b950df693043f5f79a469e467a80df482daf962ddbdb23e14c87d6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCABY1484887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52147b0b58835af7a5f4680c802f83ada25c207754b27835f2e50fc16ca3fe8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:21:54Z), 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/TCABY1484890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d63cb71cb8d6c72f2489bc98479707fb6ef4e3dcb371749536cafe10bb511e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCACG1505877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4368ab94027246512281da3561a53313b9e8f75ae58e117c112a46ba98f2331. 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/TCAFD2048412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6d397d0071c1128e96e1f3d7ddaf7b5f4f2bf18fd75334d25e1092943a558. 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/TCAFD2048341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818bdf9b30c8252f4d983bbee2b0c8e20f708104df82359f3323e2ca03a5bae9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:58:47Z), 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/TCAFD2048358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9daa1606f09de8e5c3f77b6a982d70fb6a4e8bf9231260997412e47d9c41492. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:21:15Z), 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/TCAFD2048366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1807439016b0926636efb957e5661d47506b221de41c75a072ff7e8da535a893. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAFD2048395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4368ab94027246512281da3561a53313b9e8f75ae58e117c112a46ba98f2331. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAFD2048412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2511c212b83c2275cbf8d9406a8c88ca6131b7b46f34472f2de362b344e3373. 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/TCAGQ2253814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13e2090575c72252934813c426e40a0010377634d659a408fa56cfa669b956a. 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/TCAGR2275924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9fd9bbdf6cc13c4198f286e944568855513a117222eab8416285651ca3bf4e. 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/TCAGR2275947.