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 0xdd5baaaf74677f897f8e5fc4e5f45944a3788fc1d3a5b74c01f1f5c4850c0aa9. 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/b34acfc3-b2fc-4086-83e2-7b02874a85bb.json and https://artists.proofprofile.net/proofs/artist/b34acfc3-b2fc-4086-83e2-7b02874a85bb.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 0x4ead828af70c0323c6b880ae395a34c94c1cc3281c7d6657b3adab6cbf2eac21. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHN62066677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a38c5c5c30821e45019797e28afe1b1cae072203a7187b23f187cf7b0a20ccc. 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/QZNWQ2133822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed70c8d207be283fef818e21af8ba8fe63372763c4ca5c55596747f8969b7710. 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/QZNWQ2133823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad0450650402cff15e1a6ddcce05fd4bd27270bb52b62dda5fe8e9d8517372e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6H2108659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1b613fcd90970c77987a3d4a46f6fe621d9acb911f5d100bdf3fa2811ddc8d. 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/QZNWU2015184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7111ae3b34d9d54009dbd413afd70d3b4017f8bca99b46b965d7fece61aae9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA62295363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ea3175201193d12f3f3b223935641d413d47aa449a7e348b40cdbbd78d37a4. 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/QZES82304277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48ed0c926de59363670cdcf5a94deab5f1a6bfbac1cd7ac1b0bca8bf31c5918. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTB92336670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48568444324a3b7eeeaaf09a5cbc2fc491a36557193a92e37ef56affc538f24a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:00Z), 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/QZTAY2309578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ef8f4d8c0637597f3d7a6534fb21131e645774d92595dd78785c6182be2ec6. 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/QZFYZ2405817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dbda56495e37832092f4adc5101a9d9a27e036aa63fbb2e03ff209fb73c5db. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN72485350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a67b5b1a10047a3b3546668aaaf4143024d05f7b49d476cd77dc89840eb2b3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:38Z), 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/QZWFL2411286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d6f53ea843b48cf045206b3875e5b43a7725841d2ea8c639a0cf404b9754d. 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/QZWFL2411287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95567f25bfde1cd1bfd80b87fff4d80787fe9908e38f8cc14128ea27a4159120. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFL2411288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea243406a4b7d8040799bfda32b417118f44fecda535e21ccf67e1289a1dfba. 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/QZWFL2411289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e43931cbec05674ea3139fd5a5a0ca32f60fc7b20ca648584e5fa8c3e0b78d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWFL2411294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff29adff0a0604c0559acfe4be232fbf1fd82cbb48e7be12478cf531ff222ba5. 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/QZZ762438963.