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 0x1eaf7beee62034fcb4d11037999fb2c6cb114fa4b7cc0313d071924ca1f69224. 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/6d96cf1b-f0ef-4061-a5e8-276077a1e99d.json and https://artists.proofprofile.net/proofs/artist/6d96cf1b-f0ef-4061-a5e8-276077a1e99d.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 0x4405d8f217f65651751d77772b9202d7423b5585c1b9acedb93432dd8c332714. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:49:25Z), 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/QM6MZ2042996.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6210bd3c2755e0b4511766b390b0b81da8112cdb4b7990174c8c629c5f74c1f. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QMFME2119367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5cc19c59b45ebae856938b6f6af14b06399706391b1c439f2b5b9bea2533f4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMFME2119385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425cb9fb9930ce9c1d3a46ebc534339eb8bc04d360b75dbc8fe64d9a8e4b7114. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QMFME2119350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5cc19c59b45ebae856938b6f6af14b06399706391b1c439f2b5b9bea2533f4. 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/QMFME2119385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6599f9edf3e5154a7284449c8c202c5c046555b25c9a30e0eaba0f88a702ff43. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QM4TX2204562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6599f9edf3e5154a7284449c8c202c5c046555b25c9a30e0eaba0f88a702ff43. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QM4TX2204562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3331aa4a2825c48ddee273093623a5d3a891de2d2e52c208863a9f0ff03a77e2. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QM4TX2285912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b3d79f94d5e335c6082f1b0724fa8f35c6c6d2d7d6727687ef6f9aa5f88654. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMDA62214876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b3d79f94d5e335c6082f1b0724fa8f35c6c6d2d7d6727687ef6f9aa5f88654. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA62214876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c048728896b657af27ea339ee563cf2585aea3b5639252760113ac13f18f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7282330230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c048728896b657af27ea339ee563cf2585aea3b5639252760113ac13f18f1. 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/QM7282330230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ccc73f2b94d16c6e7ff3a6134a5a06bc20c3de3aa78522f7b76f330629a64e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62214873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f9f6bc64e8f194d56bce1cd76bd7d81561846e5a3180d7f20e2b2e2cf29beb. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/UK6KW2300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119170152734d29feedadf6f5a9f85324bd1cfe1d642a50ae98b524e2220bd84. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/UK6KW2300346.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ab64e846eab9a02ffb383ac829882788400da5cf690ba9444206ec4d896a85. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:40:47Z), 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/QZW9M2437714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c7d108daf57d3c57f1699f1a879db00ba4efb1503ea90a8fc44b63022fab39. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:24Z), 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/QZW9M2437715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15f0bb304423fc651c56a4aa7de5f10162e8af03be0e79e9f3d66a40888b4f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBEWA2400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c2689ce9db05632de94029a3113e2da97321a01e8634610cc19218015874f. 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/GBEWA2306404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb060fa434a827791cdb29fcdeb19b996406b6b388babf45c19165b6b32ea6878. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USUM72211879.
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