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 0xa82e3b34f0625e387fea4ae3351a30cc99fdaac0e436e54eae18d93210755ddc. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b327fcc5-17aa-4995-8795-af2d443cfbb1.json and https://artists.proofprofile.net/proofs/artist/b327fcc5-17aa-4995-8795-af2d443cfbb1.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 0x7a375e8b004b30a480f8ddc99dbf8333d2984d11ed28bd1cabf31a5107ddfe4a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:01:54Z), 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/QZHN41930370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be520dd8dd8cbf6073d6afc847d36d2e855bae159078d250be14c305c7f3b72. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN71934755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9628ac881104dcf03bcab85c1c2c9cd8b4e004880d9f06cf04e6a13670108af0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN71934756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61438bee1870243ed21186fc7a110de334188d00ad9c8b2278e4114355d7fce4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:41Z), 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/QZHN71934757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaa594d7851e80355a5f0133551819094edacb0b242e5d50cfa9eb89b095c68. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN71934758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c76cedf7d4b856580b7eb64f1e86c3c54df4bfc252c22493cc45f7181b17db. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN71934759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf686b554c1228379648d65ec1da74fd9518b731fd14581c98b0035653d5de259. 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/QZFYX2105230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90abf7bfba387e797df1e604e5c0acb5152ac56def1bbb5b6de64ef4eb6f9619. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA72103052.