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 0xfcc67590801e3a137e6ec97c88b96411460287ea652e55fb64a90906db868731. 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/5a008a2c-3ca2-45eb-8e52-628907d0fdf6.json and https://artists.proofprofile.net/proofs/artist/5a008a2c-3ca2-45eb-8e52-628907d0fdf6.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 0xf37ac675642705b1f1709e65eec733c034309d492a9bb515df7920ab0e816065. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFZ22062233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95282ee0de0e27208b7e0338c789dfdfb300bfe94df45b9d1861343201e4987c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA72018741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec277a67cdd6e1a1e3221af4fe68bf23abaf30c4ff2aa0ff9881ed397258b4c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/US3DF2233301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445dff9de227affdbf3c5f8302c27c68c641d140bd18e7646757d8e18fa645e7. 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/US3DF2404634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c07aef4778187eb8badb1292ef2441292262d3452e53998aafb96cb95507453. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/US3DF2404630.
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 0xe00a6d86a7ef9f4a5f969cac3c00073d7d6656df40609e03721978053e2caaf4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US3DF2404631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd664526a8dba68368c78a73d4c8c941829aabf5d46e65fee2d5158854d741920. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2414815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88a3e34da29705a64fcdd23ff8b99f30f1960f8a3cfc5baed6f5a0cf8305432. 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/US3DF2579221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c65335c0e14d8814f74f8a3ba1a2bc3ddeaff00aaa4297bff981c242bb46d9. 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/GBKQU2143679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1a68f4d37485b69436027809c90b4e7f49779d8f6d9bc935101b9392912cc. 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/GBLV62129243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147dbbbde64828cfd01900f300e58b409689b8e8cf50b2396f3f2a33954e1a5b. 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/NL4YD2200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b5295229fe3cd7eccd7a17d01e7116f6877af944018e083d5eaa43ef20459f. 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/NL4YD2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee37992ddb42744ab544136ea55b5065531a6c611a671aa8a18d0221d60c6518. 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/UKZGC2407065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17444a58895b1da188a9f511c5f308db0a22609522092e65741b528d97f6d099. 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/QM3DF2213398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba0a472dd088eb4cddad239336753d64ec407f16045315216c5e5a43504a4b1. 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/TCAEZ2059174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f62ee6c91aaa8aec34458a4b069b70d364c3267eaad1ee3a11cd3456b9fcbec. 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/GBKQU2189469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f003f9b143206910a869c621196e46131bdc2fc40f656751f0207ed78770a35. 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/GBKQU2189472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b5295229fe3cd7eccd7a17d01e7116f6877af944018e083d5eaa43ef20459f. 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/NL4YD2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f84f2684c01a3385074e33e66ec72d06559dbedfece4082caa5d372a29b969. 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/GBKQU2181813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c11bc829ff02087376cf8f4a92da87028045ff51feb30ce1754d48810a3967. 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/QMANG2228947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba6c16e8b8a09fd2794fad040dfe8a74212454f4e1ce3627f999914af606dcf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2101984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a907a99adf8799dee4435ab0486b8fac4414ac94960b272fe3b6dc14dd3954. 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/US3DF2079289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6b32f9c6d38860d447404b3cc54af74954fe65950d5d318eb285d3a1faf9c2. 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/UKZGC2403472.