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 0xe65a0118433367e8b3f74f94013f5aac430f9f958f59bb66ea8588094be992df. 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/46a044cf-0cf3-4efd-bceb-281750b1f091.json and https://artists.proofprofile.net/proofs/artist/46a044cf-0cf3-4efd-bceb-281750b1f091.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 0xcb4c9884b513167f5087187c571d2e348e85047a016921fed4494906035ff1ff. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAEA1992111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985d1389b861b704a4d5fbccf200d8f9c945915db90e89621f3219f8f2d0716c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAEA1992121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd8bcb7dcdc09700b01bcc430e1053ba148cf28d60d7099150200085f162e48. 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/TCAEA1992128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c85e2fedad51dc07744ac3f0b4e6c92844a87ec05ce59ca96c323008f04d16. 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/TCAEH1936468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb43810e2fd59ace12e6d6f6d0b06a1bf69d36875d1eee97d3f7ff4206b193. 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/TCAEJ1923951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00546fca49b616b2fee079ad0c60d9e278f7ac226f15643e897a7e8c32317ec. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USUYG1301096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d713ad62f076be8e52ca1ad4de9d7a1aa41f31b8abb473f28ce033e1d69c5d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USUYG1311547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a74034eab0a0707e1e3529682f2f6c8d0976860129872f45a6e6a682853204. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM24S2306942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb31067adf6671eff83af69a38b07f7882759a4341311920574a0c3cd32fc78. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/TCAJG2538874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e0c17fbba291f61fa178be97064923318ea4aa984f91a68ba1af6d10dcc9f0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAJG2538880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb31067adf6671eff83af69a38b07f7882759a4341311920574a0c3cd32fc78. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCAJG2538874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb31067adf6671eff83af69a38b07f7882759a4341311920574a0c3cd32fc78. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAJG2538874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f246b3440bc294752ca9bd978b1dfec1155ee031e4155e98328bce62282b1f7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM24S2503148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bd5eef61c84b781edee187c1f34e33e0e33945ec9ec36e418792117161f341. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QM24S2503147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a291063bf59165d4ca7e828a1577c33154691092d78e6ac184c843af0096a80. 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/QM24S2503145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7995cc1d6ad36cd252a95cd2b51527d0f2f5edb0bed29a405ac35ca2931c17b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM24S2503144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f76324f6a39099ef77e2d81243326b5d5f684b4fa1ac728b98ea3e0314d101. 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/QM24S2503143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49578c59b1cdd903697fcee5db2fd8ae953417fe1fc2dbc8ed872a45c629c01. 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/QM24S2503142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e0c17fbba291f61fa178be97064923318ea4aa984f91a68ba1af6d10dcc9f0. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAJG2538880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e797e14f0a982f2a41ba91ac1bddd495d36cfbb1a42a5ca940c95e2ad4132. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM24S2503141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a4b8e13b880777f8251e16587115854294c49fe9f6cd0d1fcd513e9866a464. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QM24S2504248.