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 0x39f74e6ab4550455e71696d7763eb66021c7c8ba3eff047becf6a2dc7c84ebdb. 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/0c229b5f-3310-4f55-af4b-50523a55b6d2.json and https://artists.proofprofile.net/proofs/artist/0c229b5f-3310-4f55-af4b-50523a55b6d2.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 0xccf50719d0cdd31e0b08af34a14080baadd6a88ea319f14185789e754eef8391. 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/SE6HN2299781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b2f79832354b806568d2ca95bbe18bda55aa9b5c80ea69664c70f616121696. 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/SE6I32253439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b2f79832354b806568d2ca95bbe18bda55aa9b5c80ea69664c70f616121696. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE6I32253439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f643f5ef8010b5e7d1f69cffdc9946f158e8ae37e123f40458352d3d1e4e344. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBLFP2270490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840b472f8348aafafcdf0cf105700b049ae65a78abd4ca887836d3d271e7a6ff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKXN22230440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840b472f8348aafafcdf0cf105700b049ae65a78abd4ca887836d3d271e7a6ff. 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/UKXN22230440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ebff8624346c57e04295e0ce1897e6e7c7f24d49fc906394bb80242feb166. 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/MXUM62300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d5d0632fb13da188bf1c7776a8fc9a229c3821867b48a9c02da73f475e7cfa. 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/MXUM62300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc31af65776bfae993507c4f096e3651f92986b01e3ae6393f58f76fa6a4ba1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/MXUM62300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8057a7bc856fe528d3a701909b649f5f9d70747acb67816f06c44f432e6bf1c0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXUM62300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aee9ebe0f546e747354119d73ebd09fd7e78320725cebd8c19155e8acdc61a3. 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/MXUM62300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe571007fd616cb3825f4a1c1fcf87bae025523ba93f09349ced05c80a51442dd. 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/MXUM62300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db61efec8ec43a3086360757dbdfd7ffff8c1b4be06833b6a900516d3990684. 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/MXUM62300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fee0d2fcc4892fe98f9bd2ceaace1db37ddff44c882c6d87afab19dc56580d4. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/MXUM62300661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abbcc38fd21bf4f785ad183398e56ba046e0884aa8fa84831ac986bd8118c16. 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/MXUM62300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d85455650c37f34279b3dd80e418782f9cec9e0a5b12926f9b78303b511ca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/MXUM62300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27602adbfa564329cd475623ab4df54ef417804d8a317eef8d411978614d6102. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/MXUM62400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878eccf923c61d28dad611a0b0db78a39eadd4b2da4e419e11898b19ab275d8f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/MXUM62400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d16a298f3d8386a632bdf2f4ea077c2425073d95e4f5f0e35f29a3ab902bf. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USA2P2472582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9001b4172f03dabf9aa7239907b8233850dda74c7792c011bb350ceea2a070. 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/QZTAW2358038.