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 0x31bc7ed261bfb3511b91f12ab3a4e9996c2d5fd82c64f0ea906bec9732ed4421. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6f47255-c982-4deb-94f0-94fea4a721e2.json and https://artists.proofprofile.net/proofs/artist/c6f47255-c982-4deb-94f0-94fea4a721e2.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 0xcf8e381c7ae4d653c5892edf983bb0d6b9c8d4c8c5091e5481f71b69068643e0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJZ2371236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3922b9fc5d1877b1e0d0197580016b30ba6a0c695181b80eab41505f9ff01f0d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTPX2319972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1c94b7ce500bee1d078a11edfa4ba07ffa73b98ea9489e944dd82f84ab0536. 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/QZTPX2319973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9589577f0faec8919f6959f7ba411fde9e7b80ec84ca90c46a3917df1bb31a49. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:34Z), 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/QZGLM2449430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f28815d1a493f3727c56f83a3d70e16367b91c26e097102b9301d056cdd16c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZGLM2449434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba78cf76ac42c9087b448fa67dece09a5a1b4f6c29197d9263c5609ac4bdbd5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2449436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302791ef2e319ba50062bcacca0acae3d9024fb224d712834fcac5a1816b2be9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGLM2449435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0932ad34702d12b8f33840dceceec03a6d523cf38b92d7055d4558d07095a7b7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2449433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88dc5634ee4f74f61c101bdbd6331d064aa4b8a72c091b0652515a6bf1a0a82. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:17Z), 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/QZNJW2476710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45058c5c9f6348f11fe35ea7f38a64a266d4f60b73d113c16a09c7586205d701. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTVM2404850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6632232313035bebea003c530f8a84590f9b21348ef6708de5534c0969c033e. 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/QZTVM2404852.