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 0x8f6114c956e8aa661175d5fc1690d94a054f66d77b1f9ae230d2f6ad2431fb21. 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/f1ca49a7-2a5b-4395-aba1-a12a244505cd.json and https://artists.proofprofile.net/proofs/artist/f1ca49a7-2a5b-4395-aba1-a12a244505cd.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 0xe6f349971bf903b5b3f10e28c915b0ec7155a16cfa626f63a2af447a52c72eb6. 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/QZNMT2218120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89714f32fbc500c83c29f3a0cf51e416afb41c6e042320748744cced9a5d895f. 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/QZNMV2217121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cca64ee04dd679cb8086bd48023b14ed87876ed9467f15ca84ac6a367b2aadc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:48Z), 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/QZNMW2223705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a9279058c7044953bf5fb2b2bc60ca82c4492ad0b7e240d5662491a2fb2e55. 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/QZNMX2233898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b3fd75edb6139f79095d4fe6794995057fe59ebd9b7ca16239f66ab3765f22. 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/QZNMX2233897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47c204bb31916326af6b56ece4a206e01afc6748faa3d8a9f5c9089ee0f785d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:40:41Z), 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/QZNMX2233896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30a6c01de2c49aaed3d2de7030e55ef3ae15894bf089364945864d5b91fa7ce. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZNMX2233895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28df6cfec2534713485017bbfde1dbda75cb78018343900ca2844fa23e7c15. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZLL92390234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5052bf7ff076b7254a4f23929ecaf4430ff36bbeb9c23c6c3a1080258fe341. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNMT2385016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c07561e875cf6161320487fbfab5c00a7a1ef65b3559085223687d997c09284. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZWFJ2465670.