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 0x33d04b175dcdccb06846e3b7fb313f62b8350e2f0c39fe2fff54d18c6b57286c. 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/41c498ca-7841-4428-8752-5535805ae18c.json and https://artists.proofprofile.net/proofs/artist/41c498ca-7841-4428-8752-5535805ae18c.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 0x8eb5d690199122f64548dad83196c05c9e4269d33abbb10a61c56974bbc23135. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB92361164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcbe1affc357dc83b40f44b04afac6942123f7f342ceaf24b2827d8852796c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92361165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5f900ad36ba87a277fd73cc5f4e8664af34bbc30daeb85d9565cb35cb2b94a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB92361166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7102826ae44b711d516a1ef4508ac8038c7deb1f532237cd5adc68c6e4c0f732. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB92361167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea71b80a27c4f2805e62af92791682b82cb466e4b9444c103449b0b07ecf23bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92361168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43c5c15635b7ce050160db616cb3af216ff3134246b1a797173e95d90357baf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB92361169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e467a266d0c9c086f65bff5fc4f10db155b6693feb30f88f2be05f9fd81c6d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92361170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8177226126b9660a22f4a9eece3ecf9dacc74e6454dcc4bd90fdb331be9cf14. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92361171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a43fd5eed728d93cf3b41dd2e61ff41f6ea3d2071966b46de7e8d8386d13771. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92361172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b77486ac3f94d2edadd4a450e60896e67a70597b2ddbbf9e2bacde0d03f6597. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92361173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ff6ffab78078666352d35e60d7a94f4a8c925259e507abc0d661d33684275. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92373703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc4c7815eb7596a128296abd7cbe89a1fe6b3c7b001ac898393534263c7b70e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTB92373704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b915c1974fca8de450f5e9e4fc5f14d9cdf1c2943c20a619c4d00ca4f0df26. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92373705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1138e940daaaafecf5988f24f8c7e48e192cbb10c39e2cdd1e797d0f8bdf7. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZTB92373706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc4d857656a54a00fb399bd314e60522f0d4cbc95d4e0bd441a46b22829aa3d. 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/QZTB92373707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd70ccabf042add7cd515d589348592289bee3b017ea3412a4683d16f411b237. 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/QZTB92373708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdbe087ff5f9b27e528d150e1b1be4e883054727c918078a10a2fc2234f2e46. 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/QZTB92373709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c63ee57bf89f515e11e698d1f19dc75091fddb941fa249eb75d4705924562c9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTB92373710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0439f84ccf174ebbba23d16286adabe16ce7214e49754c14ecd564d240f1bd7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTB92373711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc33de0b2c109477ad4f8fa0dd7783cc48da7fd9d405a0279a2b782ec5e4c46c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZTB92373712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38162fa197c27bf41a77e0397fc6951fb7ea760494dd4ab0755aa661499b2bb9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92376317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7836c33c762c0ddc68a26080c9dde0008295f94c8f4a8bfaf9c6e5d0f7d5b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92376318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1017d6d1265b78a4a98ff2b4ceb7c81722ffc432c722dfcf8b2cdd5005b03049. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZTB92376319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344cda19ab7192b66d3ca0023905819c7567ef1a703273e3787ed6e1572c840. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTB92376320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ba6fae717c30e0d74eae379b2d2d8b03a1a1150115c23288302740dd1f9b09. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTB92376321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e21f41604c511b06e2c554e6b0102cad406507994e6d4ce3a5e27ff61dea87. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92376336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a9c7651f38d67272e590877b29ad0299e5e3a51e0e3ddb53955383b5c3e142. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92376338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e7c8c529435b29bd9acd76aaedaeb1c794300b78c096178f20b1910c9b499a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92376339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e7a22da49ac58a30cecbaee77bfe4162cb8fbb2bd06ea2aeb62210e53abe63. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB92376340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7600c84f55529f7b49290801af17905358a4427623c39117f921e622e9db9cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92376341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504bfa60db142480deb2ba8c8e2a16a39be0295d03f110c37ca0e478c5e0ff3d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB92376342.