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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ed8e3153b14601c59d954e759eb235271ef7fecfc501630ca1af1e6bc7e81. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e61ce6f4-3b9c-485a-9205-1e740159a71b.json and https://artists.proofprofile.net/proofs/artist/e61ce6f4-3b9c-485a-9205-1e740159a71b.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1506bba5c93f076a155049611fceb87ab0cb2f151f96abda64b8e22923eb49a. 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/QZTB92243166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6299b0ba1eb701911e32c025f62ef6524614eeb0db2b3a30e5f9362859ee6e2. 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/QZTB92243168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05968de8271b66dd14f073957fc79e87e5c10dd61e170c769844cba28aad4ef4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZTB92243171.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bd6ee00c709f4fad2174b54a30a80ad66647191904aab90ac96541a69120e9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB92243173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3be6c8ad6c6a7dd47db986ed9ffc30f6ab890951ad70f0c88f5077d4dc1aad. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB92243175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841f31a0722667247c240cfdffd1bcb2e5a146ddd13e8a581b73bce46f80867e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZTB92219196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ad395f647a4e642fc4dd3139de44f93873b6d3492ad01fe92ed6facd45ca49. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTB92219201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544b3653020b9197f520e1f303d225277e2cc8b3823b3989daeb07223519f6ae. 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/QZTB92219178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadc9f527aa863aaed172ca3c32964d7008de2df4d56b51148d575403eeec52a. 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/QZTB92219182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4645e6c4894a0579465a6973fb98c67efb4168655b9d302e896e6619eb223f97. 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/QZTB92219184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65971bee3a58d746a76e051710e4c2bb4891304805c9daee7a33ab191781fa8c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHN72534464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a4c17d823fa85224be0fb95f954678f72e3213a6cfbf02c1c1d2edf88dfcfc. 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/QZHN72534465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414cd00004ffa1fc7aafcc1ebd8ceb66f195d094342220f0b5bef0ac39d2e7d3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHN72534467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555357c6d0d29960cf99edd423794dff5dd1ac59ab4f1678d4abd135f8127da. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHN72534468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ba071139be1a7ab228b4781ffa98eb368b7796e38a4ed1f23069391356f4c8. 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/QZHN72534469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d87f1faba5c142a42f3e405ed336b06902126fdf265771b99aa51169453a87b. 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/QZHN72534470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224f18697ae14a4150b50611163e9336c4225bfe91065f0d6d3c9f1cd44ce8bf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHN72534474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf1d263a33e4cc922bc1f2451579c212481a390d97eb4335c6ae5bf4d336aec. 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/QZHN72534475.