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 0x2355de97e6f9cbdf87ce0a8d729fd2c7698f5c2f6f047c5d003206b37f93e7be. 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/29f070f0-8404-41d9-85a2-8d9ddca23245.json and https://artists.proofprofile.net/proofs/artist/29f070f0-8404-41d9-85a2-8d9ddca23245.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 0xd6a93ef372c3a4cc169e5f694d6937b17c3e9318449aca4f9fdc232e138f9f2d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CACWV1935801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c51b41b9160e51bbb39c7b3c266fe7e8adce7a309f3eefbe3f82fa81fb88a39. 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/CAGOO1950811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7252d0ed448f45715d80540f47c2d2aa5fe635b4bc971709db43b596510b17. 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/CAGOO1950812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2534c6fa7638d5a771e562b0b717fa51b487724d7a6f3d0aae6aad7c7d9df57. 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/CAGOO1950820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5003c69e7af20a74ca20585d987df8c1310215ea86c4789725983c9c16620c5a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAHQJ1904958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64da3fe7f00cff0194bb5b1b35bcf81ca378d48b5405bc54726036f62da7ef0. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CALVP2081074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16cc8b24a19e76808037461e97a422e8962496b23c17d2fbdd54aa4f068cb74. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CAENV2050006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6443c16137083d91aeddf1a9db5965bcdda6ea57f6f687db581a262550e8e02. 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/CAHQJ2167379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd5d50315fddf9594342018a40db8ab4d3d560c2afd76f3730816e3583376c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAGOO2228437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87c0280b22677ea192b4813f805b5053b8e5e5a1fdd5c01c2ba8cbe70f099cc. 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/CAGOO2231623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc06ee86fe678f48d0a49d72732b58089717f85a08b92d3acb490f9878f29d3d. 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/CAGOO2228465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2de4e2cec01cfe7de6bc071624357c1dc020e1edbc2888fee99f8af179f4154. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CAGOO2228444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bda53254fd23d75adc4d35175de44e4f17ce5cba4235615237783e603996690. 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/TCAHJ2335802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde21e3f31ca671fa57c497373c759d312f2bfca9e273df5ca6dbcfb03fe40d2c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CALVP2489047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350b7dbe8ab04e3bbce732258d033116a0b1146d87c89157e2b1f53b57e2cf09. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CALVP2489043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efdfe1b663bf13362af3d8db79aa754e28a502888d4f26a0ca524cfe98fe377. 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/CALVP2489046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94de15a6dd6ba05d447b4b2ab477293cdb2b1c332c3a165131683d66fadf3aa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CALVP2489044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18357c0ab178b3b612d459fd8c644a93f79e1220f6e5809998134e15c3854589. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CBEYJ2401762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3691fcc635fd1103231a925e4acfb9bff92b69f9d7b7b080eaa576d624e1bc. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CALVP2489045.