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 0x6d12c5280184c5e97637c8282719c09bac88619890ec377ac123fad1fa562727. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5beb8026-fb77-4144-868b-6caaceea2c08.json and https://artists.proofprofile.net/proofs/artist/5beb8026-fb77-4144-868b-6caaceea2c08.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 0x1fa87e92c392847cd95543c7fdc7b9ba44e5de586e7685dcd413473c60984add. 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/QT3F42444089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a927a183b595092b0e762672c97f3a25ac66d2c481d890ac904f584c62081f. 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/QZES82536664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a84eec8e5da51541f0e96e377594f5e995b83812d2bf281c0fc01de71bb6d59. 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/QZES82536665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89522d8b5247d30fbad10e581ab554accfc609dc62bda3ffdf29d75e62c7fc5. 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/QZNWV2579604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a927a183b595092b0e762672c97f3a25ac66d2c481d890ac904f584c62081f. 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/QZES82536664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9e1774911ac96036f00eb743f5925ab01740d68e5a81693aa97aaebbe567d0. 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/QZES62585095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a84eec8e5da51541f0e96e377594f5e995b83812d2bf281c0fc01de71bb6d59. 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/QZES82536665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ad4a113e8b038f0e7741b0a38906b23b957bc05f788063f0a65dd9d24b8efd. 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/QZES82536666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807071ebb4f8b577da6fe7d5a4b71d404b6b5988fc660a8a86c1195f273a8467. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES82536667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2fd6821d39011b497652972af30386cd64fd18386efd15dad7122c86ff59b6. 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/QZES82536668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08bb89ee6eeb5d79405003aa0939aa4170ed8ae88a94f42e9af356051492abe. 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/QZES82536669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaca12505986baec8ddc4814b9cd62958f78a3eec04b0d035e7b74da1a5387e4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWW2517510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b38ce0ab2a82ab813dd5043e1d938080d378837dde0621defca05b47c4b9cc2. 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/QZNWW2517511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c387ca94a46d2877ed90f43e78cf4f9cb22a4ea93c41d3f0ce6b4ad4e52023. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZNWW2517512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad8a75ff4b288f9f64bc0ae49b7c9e12000fad69670d524fc020efec082765e. 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/QZNWW2517513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46763d66ad93e26a1be4bdc6ea1e0ce6fa1668d4171b81670f7ad0dfea5a16. 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/QZNWW2517514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5814dcbf8c67d4b26761a4c57b5d3c3d672ca6f1648fa2dbb7fbd11583e3fca. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWW2517515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2c0dcfac3b40f0365f2dd4328c6b84537bafd9f9b4430120a9a3093f608501. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZNWW2517516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d23d4a41e66730d6505e2900fbe3d5935f68d0d3987507f1b259e77e9b0872. 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/QZNWW2517517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcac3060c6bc378205e019b8480ef45ebf68b2585336b5f5654c014681bf895. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWW2517518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4634ccec50d36bc18176e0c9e6bf688058e9840414e1062f97c565d215a6fce9. 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/QZNWW2517519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4e46f5a148e5f00b4d8a5273e0c2fbdacbbc1a54657c467f1c0e5f9c6c6e58. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZNWW2517520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebb4e36938a3bd2be85dd73f0ca64e0f86d19d2c6e66d3a3aeb8aec1903dfc6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFP2587975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa348ee7b9d3a969b2c8fab927552c5ad9575d395cbe593dd0d89af4a2493c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7W2571032.