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 0x56eb658a49a406c296de9769c3ddd516e072db41c321165acb2504c20ac78ef1. 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/f8b435d4-c31d-493e-9410-9bd0eb31580e.json and https://artists.proofprofile.net/proofs/artist/f8b435d4-c31d-493e-9410-9bd0eb31580e.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 0xe367fac2d290a6db96f1c18719eb5b76984a0196d106c347568e40d62e3cce22. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GBMA22402027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a8be9002b7d74295be99d1d626823054f8b74d0f5c1ab50999aa67e5398221. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBMA22402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1faf44249183a93dd86cc61c3d9dd66967f341b48d39f60cf205abf247e691. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GBMA22402031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fa577fee62c782aad5d744367c7b5135543aa739b89208232259c5db230111. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBMA22402032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1fa1e72f47bdbc13eece1cd47e42eeee63d6ded0565debb367fc85c3bec087. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/GBMA22402033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c35dbfcc615e77b683788ad5105421f50fbeee3d3f5dda45b83af58d11d434. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBMA22402034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c39800abad2b330dcbe142208bed55245d56177f3ef35e19c1f07fe6b4b8bca. 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/GBMA22402035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03087583d78edaa6b5af779e4ef8cdd586cf53da3b9cfda5d9d22c40ff669e. 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/GX53U2350672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd120cb5b8107cb4d60ecb3fbdf9192f9b90d944aadd4074e4277ea1aa0cffa4b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX53U2351038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9cb6107e670f379135623e3bfccfc550be4a29d79da6fa68dbd8441ba4f69e. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX53U2425518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4b07e6c19545e3c7beb35a616b2779b97bfbb8878d53a206c60b47494ba0e1. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX53U2425515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026121bf666172c9d5aef70f2b65f9d1c5806c6ef5c16f45c978780c80ff8c3a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX53U2425525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd2bce924f526de68068ec798011776a6d3625c9cec15990a9c86383696a654. 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/GX53U2425513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb255ce5af3d701cc9847758c863d06daddeefa0dddb8c70801d34d9080e7a1. 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/GX53U2425521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424e4cafc41c397fb631e51dd4f6142e2abf327175c523bebcbecb411169c463. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX53U2425522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a381f21223391e6767caf73a366e52e731be6c62f0d43402819c83d9a611e16. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GX53U2425520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f0ca8ae1b487ce8fba9476789023331cb9acfb948ae140ee8ac452bf9779da. 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/GX53U2425519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c84a31b1f2368b1c53eb10e2f7177bb7ad426dd8ac14b1b176e09feedcd210. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX53U2425523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e877e6aac1ddee00578c5dcb253d97d6f304100272ecc5b0589c0aa8270dd8. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/GX53U2425514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab35e824f006205de73b717473b6282eb2451345f1594c5835edbeee272e8c1e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3EY2559212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fcb4362f055f43beead22a2056022173876116820d055880c4cbb1afa1751b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QT3EY2559214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a8271635f92075bd7afaee2f384ba6344f2d3d6f51af6ba0572baeb9275f66. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT3FE2513511.