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 0x6a8cda7278fe551ed1be5d762d2256f707d9ba1f7db095edd9dc00850f7ef9c9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3003a33-803d-4265-9593-2fd6137346dd.json and https://artists.proofprofile.net/proofs/artist/e3003a33-803d-4265-9593-2fd6137346dd.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 0xb2d8b4cfb4c76c492f5cbb0484cdd17fd55b3a62baa5f841ae4e3ddb621d2cfa. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AEA0D1825406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd471e8dd395ff481ee78589f67042075d93f8d12f85757f9c74ed1e3f2ed2649. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:57Z), 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/AEA0D1825409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0706365ea893e397c876af984ced73968b9c656e79ae2cc53c09701eb991f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA81980305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa745577ccde6d868ebfea84790168543be4bfe0f1448b2043165c30607dacffd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA81980306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe353545d9b3afa86bb90c033fa64e49c8e747b06e3ce52db4a62225a75ab2d4b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA81980308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aeda44f5f78cf4785169badead647851a6be6090f1eaafcb810160bc49e3b1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA81980310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3036a4ea18a4542eecad690c10d053b97bb00ee209065ebcb039bcfb1adbe92e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA81980312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f793a28e89aeb724a48473d22ccbc43590dfc0225caa22449fec1cd48febcc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA81980314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd737fffb067edebf1a8231c205e317c179401622ee4fc5d04fdfba871203d0a4. 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/QZDA81980315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aeda44f5f78cf4785169badead647851a6be6090f1eaafcb810160bc49e3b1. 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/QZDA81980310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4cd54dcac5246da9a1e070dc72b57c952731e47f9b0ba1425c1f60ac72e0d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN41982858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e5ec54efd212197e57e3bea5702c7140da39220e685e44fb76d61e66c7a3e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN41982861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d99ab1759dec95c3fe8ed63fcf48b3c0b233b41825bdc50e07c08ffe8965a5. 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/QZHN41982865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd62ca15163752fad9590e2c5a5dc400f26a9eebdc03c18f9294070ee5a2c2ca. 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/QZHN41982866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97a240d66411d8f11f6c5f62c8297a2339c7116559e73ed2b8b75ca8085ca92. 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/QZHN41982867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16785b9eaf6da27bcb237d5c1ee0eb18028f08091af33e0c8059d3d2dacacbaf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN41982869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd62ca15163752fad9590e2c5a5dc400f26a9eebdc03c18f9294070ee5a2c2ca. 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/QZHN41982866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04950ec2cdaa311d5864e068f0fce0b7268d253df7b5ddb2cebf1f8b09b45945. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ62050080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04950ec2cdaa311d5864e068f0fce0b7268d253df7b5ddb2cebf1f8b09b45945. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ62050080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df26da26769c8659471c0ef97bb7b7e9ab443d93cb6e22e533a035eb56db976. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FR26V2008565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1113527c6a8dda7c05ab37fb5324814d8e65edf00ab0aec95c2103e0bdb80ec3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR26V2008571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c843335afd2db18ca1630a0f78caf596847cb514ca4f5b7dd11bd311948f6. 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/FRX872196492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1631c5bb3fe63e8fbd7fbddaaad861e689a2ee3e0b11fe36cf517b5c524013. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USA2P2241420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8d8b9a3dbe1ddd9dc1922a60179c0f69a85aaea356f1a5793fd0bb3f6a04df. 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/USA2P2301473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55576c4d7093d5d67de07dcbbba79ea6abf786897733601ee2a3fb7d47fc35. 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/QMFMF2515475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d9cdb7b597033bc5536125b2fa66fb947ed12c346ad0bf81f1d6d7a6a9dba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES82156215.