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 0x38137b7e26b4bef5fb9067dc4f95701673b08f86ce425b4dd9facf0ccde67f03. 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/7d8e7f0c-5204-4d08-952a-0474a1551f06.json and https://artists.proofprofile.net/proofs/artist/7d8e7f0c-5204-4d08-952a-0474a1551f06.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 0x11938ea60602e2ef76fbbf60d051050f79ee85456214d1d9c9e4ef35144559ed. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBDHC0502561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd12d5d1d459b4c918ade10d1bf76abead01af6c04df1fec44bc951432ed0fe8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:43Z), 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/GBDHC0502562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b9f1329506d082f2f22432ae756fbbf55d912bcabe8effb0cd4a3433531e0a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBDHC0502564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920772517e0263e9989e6a53cad8036af5b86abe76c3a631a87a22028403eea. 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/GBDHC0502565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4105d14d67a57cb1e0d14194fa846b59f56a8714df5fd533f3044b7db8295995. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:51Z), 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/GBDHC0503641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74920869ece8f23caf6989cbe640960f4b65b709222c77f4e0839ae7f32f3b5e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:28Z), 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/GBCQV0501081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee8d325e4c606232d3fc9f286ffa08e9dc2eb0ca96565a519a8b42d7ed69238. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBCQV0501084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d8b160e5bb9a5150132d7951ea341454956ca10e096f040d96d54a6deb38d4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBCQV0600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a086dc7bcd884f85925aad43cc4d1d030849cfaf6a02ec1af8ca5d5441339c2. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBCQV0700932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d194e1af5f2f1ea03a218ff45324fba3ce3396fbbc2a489736be0fb17271f61. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:06:57Z), 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/GBCQV0700933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2af00f4389ee855f044e25641fee90545ccec03e710805b4cebbec86cd39a79. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:29:38Z), 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/GBCQV0700934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754caf916e156f94bbb97fa184a460ceff5a172ff6ce5dda88a403b885f6101b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:42Z), 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/GBCQV0700935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac2788e42ee57c4f24372a8cdb736183dc066246e26a40d1adf0e0051167857. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:33Z), 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/GBCQV0700937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae3ae4a287c8cd32d3beab1ad278a1256d4372396ae2e0b5ef9eb76ed2cca66. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBCQV1500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7030b0ad9c586ec23a5ee4c25d405bba5dd494cb3eb0e0f3bbdbf91028c83737. 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/GBCQV1500400.