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 0xe7c0b4b006abc70bfee94723e56982db192b86f7e3ed8de9eb76e51435c0f6d6. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54aadd5b-6076-430e-ae86-57a9ae2bcad7.json and https://artists.proofprofile.net/proofs/artist/54aadd5b-6076-430e-ae86-57a9ae2bcad7.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 0xb3f715400fd76ab5d45c75de3b9652541dff722de50209faa4235b69798ae04e. 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/FIHL21800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bee7fc72753a573c8a13bc89a278af9226e5c302d7da7cea42c1e6455705fd7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FIHL21800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78d41b6ec33caa013f022609ddbc8c9253566af6ee74d83e7d93684f87aa140. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FIHL22000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b41412dc64185af95c2fe27b9ac9cb9d1a752e6edcbcaab3c37bea842dc29. 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/FIHL22000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d758a069df2ce888ffe5c8b5f272a3d3b46ae522fcc2c3fd379f842789354a5. 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/FIHL22000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb106e29e274e0d1ac316441a3f2a3f9d0984117c366c151fa7937aa632c7f3b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FIHL22000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ab4d8245b0dc32514ddc23cada39a933a2e7d02106fdede88145486456d7f5. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FI9PF2100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc77e384e67ced2c4a61eb7c1f37805b04f53394a766a62ee1ac0dfa90cde99. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FI9PF2100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05155c41ce5b0d188f10f129a253cba0b2e7f656a4a808755ec4e2880513cbe. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:06Z), 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/FI9PF2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443c4c94cf728e0d4222c034f1e25a016de7e825a543e7699c915f2f5be02c64. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FI9PF2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95757ce801e85e7cf1e2d74565ad0dd793bda2351beb250c988832991c167441. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FI9PF2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90ef89274254aad1706cf9a5dad7c04d98449824b5c25055511b67dd9ca42df. 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/FI9PF2400109.