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 0x11b3d8cb70720ede9afc0af4a94502ee29008b98b830b305f2e38051eaa0c0c0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c75f2493-a12b-453d-a42f-fa1f55eacea9.json and https://artists.proofprofile.net/proofs/artist/c75f2493-a12b-453d-a42f-fa1f55eacea9.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 0xecfac639d1e86841d808b1960cb01f316616a4de679b1d04ef891057e9538288. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/USCGH1639907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de871802443e7a410851dec63471a667353ad44fc5c0487fe6f7a3de778f4c9. 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/QZCE61871267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769bd21513840194045028ebdef47d94e5cbc5815d8414e5c530fa45b7e55f81. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZDA51900490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a551f88ff4bd33bc776f6ef24b94a37768ab5cd386bdf0af5d5e59c60945eb0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES82092041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783f2f8690f866b73e72a01caebf3671bb5b22d27ae756ff8a91d6fe84689659. 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/QZMEM2023978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858bb89838582bd0286dd5ae0ea8351f60516494ac88c49e9875ba657228d7e6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:43Z), 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/QZDA52153285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fdc073e22dd9e77cb553068956ef66d9ee39e9cc4c8b7648fb11950390c1b. 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/QZDA52153286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5316880e9c60a9dd3a56ef38a3d6921f1238b6c2cd4e7a3f96d3d82ceaf85afc. 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/QZNWZ2025208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6810e476a6258d9b1e9a1bc43f1489c5064e55c272ec8a2e0b7b8cba6527fe96. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:26Z), 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/QZHN32157014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4589ce0a484bb222a4e97c32739e89fd02549a5bd89bfcf8d5e022326a8f0c6c. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/GB8KE2214430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb061d2e90de08d93590d219664f5b9631d95b869e73d2f354eab4948b274361c. 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/QZFZ22323971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51653c1d5376387bc7248ca28422aed93d252ff6de4341c4084cd7d9bf1c7751. 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/QZK6G2205184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b005e7844afec8964e5da2b482fee31ac0dfdaf7af04e7f7ca8feeb1c932132. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:57Z), 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/QZDA42389875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b9eb3b5feb7643ad2e59fec758b567bb94ce07d4d1ddd496e215fced485096. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:48Z), 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/QZNWU2364463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894d3e99958e927c2eaf227eeb26f14f146761fbed74fcdd6953e549dbc2358e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWU2364471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd36ca0dcf82b6add1a510e9be98907483377a999870af2e52bcf520e84bac3. 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/QZNWU2364473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baf42a4659e081b5030ae903ca1428d4174541044def27838d9d0efdd12db3c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES92425703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0fe35451c6a86ecd4994453ef4757daf72cba32a3af5cc9adfc75193f252bd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:40Z), 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/QZFZ62497326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9966a5517298e15d4fd19a2bc1c84232b2bd64486e23998cdd52f7ac9baa240. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:43Z), 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/QZPLS2437477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2e49b031ea47dc36af2b0aaa99984733379f276c79bf5dc213ae335db7584b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB92464619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3172249f9ee4dbccfba481383d3f5d8fdcabcc4491451a22314108197b604. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:57:14Z), 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/QZTB92464620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf8208e56dc95f65b6e719b03692c8aea666e115569a32d95168f420091526f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTB92464622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde79df0327fcece3f7ec2af9c68511980ef5cbd1bb2650a848e075f03acd5a5. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:00:52Z), 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/QZWFE2443683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee6906be59973663a3eee2c1971a7d35d5eb083aa82041a8fdfcf01be33344. 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/QZWFQ2474088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b01fa2b75d68524c0d9aba3df3466a630e7d897a1d3579c12379af1ba31667. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3EX2422314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e156f9747618d83f6797a0a05c2774549ed0a427c6598bb53e30934ef814108. 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/QZDA82595880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395b79f48fb33903b44549c788beebb23bd842ae352b44ed46a1750d855ee32. 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/QZMER2518527.