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 0x636e766ace7ee6a826145d89a2169f91d8cabfb5efdea9c49dd5e7eaabffe47f. 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/52fbccf6-8c2f-48b9-81c2-fb78e9f7b4db.json and https://artists.proofprofile.net/proofs/artist/52fbccf6-8c2f-48b9-81c2-fb78e9f7b4db.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 0x8b5f17c171f5897708a9007110fbea93e8db2258120391902ceeecf92ff43945. 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/USHM22192209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b8e55700c0488fe809b33f6afa73b47971a6528e35a0007166e07f70f47e2b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM22192213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15672c18aa58276ab487694ba32fcf4fe76fce5992289c23fbfc1ec24a9f5af. 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/USHM22175547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf7c54a782a5a09b30716d5530116f2551ce8d888e994b1130052141c36c80d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM22193497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda9838546aaaf1c7ef4cd8f813d5049eee4efce36dc2a401d85045c612b43a5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:14Z), 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/USHM22192210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabd1aa735fe84eec6e9a570509fb9156e61273eb4c230fb26461a7400f46967. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM22194176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83e104459bea83a8d872916217fd6ce94f503c7226982223465510e5a27f7a. 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/GBLFP2282574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba03cc7082acdca6daf806de641259d4992b2d786a5878be57df182ec8cb6b5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLFP2219232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bdf59d9b1d20170a916204213d84ed9b0d46458383d58c1d7c3be6c5d5aa28. 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/GBLFP2343454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d57ee59f86de0d8d57b64a325d4d61881530fc96f1e0ed0e12a6384b798aaa. 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/GBMA22488648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912a4388c6656d96f0b7080c8feffdbef97ff1543135d52d8e4a0c7b9faed3d0. 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/USZZR1013514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441fab76a63660885f8ce3f329a2318aa1af586c2b682f85c462c91b3e5057e8. 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/ES71G1875002.