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 0xf4f944c5261aa8e5a25a5017ace19d852f9b559a13ec1644ce68f38d459844df. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a692f838-2d99-4bcf-ae03-0bdcc0ef85cf.json and https://artists.proofprofile.net/proofs/artist/a692f838-2d99-4bcf-ae03-0bdcc0ef85cf.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 0x956a74478713c2257caa5051f100790e36525df5c6e6b9a1976d3f1db5c62707. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6N22439164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa84ea5ade0a0957064bbb333e68a969ddafb8038a16f9707b8bcedf4ffdc43. 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/QM6N22439165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e813bf179c6cd28ef9f33538a3afd21ff9815bb61a9669051b5b8ea043b1222. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6N22439166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d211050b064bafc7a54352e9536be241fceea9e55f88e4b052619e7225382e8. 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/QM6N22439167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5924876d8756ebe01a716e3f1e13396f5e13b6e1ada5d65c3a20dff5d018b811. 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/QM6N22439168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d28ded5877638698c08238457297d4a3f34e0205db9ec5901e8bda846dbfdf3. 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/QM6P42371304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ba5b0ec82ab5d21350e570986d7d1e83fd8ff28a3ae9b28b8e991a7e4ed110. 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/QM6P42371302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dbf87cf179f5019f201464de413949e54b31fbef2841388c6f0a8d30f498b1. 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/QM6P42371305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38382d3f7d091eec378c472ccddf39f11b8d8c8a5d93876d64df4947f2e157d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6P42371303.
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 0x8ddf014a249c75137aea2cc70e9b4aa12297b31c2e303c8d8290e3d0c7a44557. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6P42371306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6d1269c7f17cd72e673793fa09bb1ec10695a1afd1a807e5cf6ff852d6f489. 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/QMDA72219201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf6c3f475f82630a53401fdea18db16844e45df277d2862f7fa70f1bff79240. 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/QMDA72219202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa48424dfe6748f587ce433eb65f4a1df3de7e739c671d557e69cd8e0ac9bd9. 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/QMDA72219204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7330fb942a63236b21cd9287ae0556698a7be8dcd9d35777ab4201ce4b5ffec. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMDA72219203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac1af52e69e62f8f8c6915c285c3dfbec4dc3e5edbf713caf4b8742d92a18c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA72219205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742b818894d2dde653e7a85852433dd25ef05607b9ed36efbe7a901a037d8bc. 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/GBKPL2294843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2140747c903aa358c137bdd2c70159ec06253bc91f41ca0b4d6593a04c3356a3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL2294842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb2794ffaa0103cd2a32395556292d8909908f4a0631b579535338d7ae6fc7f. 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/GBKPL2294845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729db2167326caa432528a800513f4a4b1965a9c67f6de8e9fa7f309785e6b0f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKPL2294844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27594500adac0f1da698f89e6dbf459412ae1071ea479fc378345725f8114181. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBKPL2294846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46912395f822e5cce7cae0910cf82c934f37995ac2abf17c8b008a87af76d0de. 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/GBKPL2171801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4166090be7c019be630a4cee0d022acd5740c25557438822d864bb23bc2b5384. 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/GBKPL2171799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14636f8e940db34eeeedd0d92a974971cff826978f4d9b94e7d9d1e13e096003. 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/GBKPL2171802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e5e6b63b85319f23f250c2f9acc92af1f0741e2d450aaae5373b50f124d7c. 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/GBKPL2171800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6c2511376aef98a7f611d100a2b29b660adeaae769d7b4b3e77e477657aa05. 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/GBKPL2171803.