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 0x3edc1555b16e2ffd05f6c1f0bca5a7ebc5b1ff12adcf0e9571857be974fb9074. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60f8dfa7-e5ae-4b88-944d-faa381fb06d1.json and https://artists.proofprofile.net/proofs/artist/60f8dfa7-e5ae-4b88-944d-faa381fb06d1.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 0x853adc3f9493d1e4e8b256a4ec96f2381846a9ef1398e7161d24e7343d8d4a08. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:29Z), 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/SEVGT1500202.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893b7e63dddf9d3de13dfbf3bec9dfa7c0090c6b139aeb2813aee050db7f308d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVGT1601201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e21d6e421a2551945d14dde63abb02b28e64c8ea9be15135b88767f29a1a94. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEVGT1601202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dbabf8480df78ef377e2c2209a48cbdd71ed4e5295a714afdeb261e662b85f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEVGT1601204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bcef8a01cd40f4ac7ae74114c0fa9ee83a361f14d64fcb3cce9d86fe999bf9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVGT1500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8633c1727e2fbc0bc8c0d11651f7d0f2989baec2e4dce742ac2e682756a7b775. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEVGT1501209.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8633c1727e2fbc0bc8c0d11651f7d0f2989baec2e4dce742ac2e682756a7b775. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEVGT1501209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d914827ff44edb7d748507fcd0c9ae7adb05998c6172d33ce05a3093c797e85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVGT0904705.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bcef8a01cd40f4ac7ae74114c0fa9ee83a361f14d64fcb3cce9d86fe999bf9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEVGT1500205.