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 0x05ce7032f3386a9da284afd60ec05fc8f212553649d59480747fad3d84b788ca. 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/121a004a-490e-4b44-88ef-b321ca292608.json and https://artists.proofprofile.net/proofs/artist/121a004a-490e-4b44-88ef-b321ca292608.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 0x15aafb901ad00e58b4a0186424531b88a2d106f56919367de5e6c720b835c557. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:07Z), 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/QZFZ62023443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef06fd91397635a80366b452f6ef74b31d113adcea38ccfc5d1c9f42a59770. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA52000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5663873da62db3321d65e51523f379ed25f0f75fc981990a041cfb32ca0fde79. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:23Z), 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/QZNWV2096828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3b5ddb32168c5057b08dc663946407e4b094a589b030d362908b7d7789fa8c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES82379783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8a246dea38bdc940227a43170e8a4b2ecee36cfdd813d39f386d3194e982cf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES52349372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083878cbead9c3dbcd0e6f6950bf9f133bcedb007d7af3523d030ec864ec7586. 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/QZK3Q2400264.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01b13d1182290ea4e004ee38173d645db51a5b3cfbbd8a95babe88265519fff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM42K2302776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8991f347dca0636e7cbd4f398251d09b391ce534c6fad7d2abbcad6c43ab74. 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/QZTB32324966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92e5b142c546a08b88ba26098affee361ebf2518f6c2850c74e8470392899c0. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZFZ72025112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe01d375037fb041ab6f43e5574090b64b425be294195fb2d833a1ff1ae08d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52562902.