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 0x61e14690575d2d526a78b0e41158f191b502e349774471ae7d7ae6a13375c7b3. 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/56a5e299-e184-4b91-a87e-dda9e2b24963.json and https://artists.proofprofile.net/proofs/artist/56a5e299-e184-4b91-a87e-dda9e2b24963.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 0xf60ed1a4ab62f236d920999833a6a7c53cec2e6718d9b258c357ccf396f8f585. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBLPF6677128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8ea36415f00514d2df131e1149620fe805150962547fb1e16fc6e2db44505. 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/GBLPF6677139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a0e8297660c3e493468e89cd28f9a215f19892aad3616acbbb622eb0b69dc3. 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/GBLPF6677140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f175c39b80ad192975d72af891a8d1e66ee8071a62e029f5493c3e79e3e1c9. 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/GBLPF6677146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc103890953b6132283bb0f9397c90450622c330ed93102b535cb36f81a1da0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLPF6677180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e96d64f04548d6a5956fe6206bac02b807ea2e44c947f182b576912e8725075. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLPF6677225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e411e4725f2bd12601843cb1639f1a47b108712dae38824fab2e4dc4ef1ac86. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBLPF6677227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa29c60ed063643caa91d145927a7161705d4ee19b85293c25274e5d309ca0c. 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/GBLPF6677194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00657351bb46e8afde5256a581abe8e404862c30cb874a59202a961103080cab. 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/GBLPF6677199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3198167c022dc721033dfd033878bc5eab58f63cf9a15cf8bd2b772f845fa73. 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/GBLPF6679150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd52cd71bca0b041c0c9a29c6138eb5e71be020046c311a85892ec30b5b87c0. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/GBLPF6770622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdea119a44748d488037829dc63e7b2df7f3465e5934c8c4cac82f3de1fd876. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBLPF6691777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54f5795200507092130ff929aa09f9462bfe7f401e056b230d662bf71f8bb0. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GBLPF6717418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea548316cf79895630e3299405c0f82ef23d1cdae73a76d026b907b03339f5. 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/GBLPF6770639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b432e4f09e0b7bd963c11405535dc57c54cc88c7d7b39418e0108cc62d5e955. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBLPF6768092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1579a3cc4c308a62b54d01a342624d2f15c91d800b63fe9c946fe2eb56b6deb0. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/GBLPF6768920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a99f617a661f2b9d9d756d9e5f9b18de6cc2137db922de9f62c148bbf166c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBLPF6783091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cfd2887f096190ec7ae1d8eb3894f3d683521df1c2543600f354754dc5024d. 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/GBLPF6801473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7d85db723723125d71b58597f2ab6894132ea5237b8540ef45e0d49224995b. 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/GBLPF2401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54660b2990a46d11d4fd7379bfc2406320a13ce2ec92510b900622b81f4ac5e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBLPF2520026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87af4ba9a9539e0ebc768081326aa3d07301d5a9c797a709f5e9c2e0f5accc9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HKD012518536.