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 0x6d1984d8e026c6df59d2b037f75af0b9ef9f019a94ef3fd648ff4f2949d3b286. 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/38ab1a7c-27e4-4f20-b27a-80f3cc0eba81.json and https://artists.proofprofile.net/proofs/artist/38ab1a7c-27e4-4f20-b27a-80f3cc0eba81.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 0xc47f9646c972d59101656b920b714187296da3ada3ff72bda2289e67c82b8a24. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKBR70901401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c339a9df189fb7f3fa047fbbbfbd7b56de122c35acd4e2877cce46661e225fe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKBR70901402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35985e8902155384a70224194ddf7dfdd85c76323f5df919b1c5033f396b2738. 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/DKBR70901403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12defadf10476882682016b9bca212c793c0af493e4e5bca7767ce009321b80. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKBR70901404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb472cfbbf78c54f56ee172589f46ab6b39d1d27c08ddaee22fc772f69e67fbff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKBR70901405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d68c62a79f6d1fb1994dfd981c6f4bcc01565b4f4dd0c62adddb497e8ad42e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKBR70901406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595105c91bbd16d1f577c8e08d527826942a93a5a462e37b21b831bc903e764b. 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/DKBR70901407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40aa2def46f9fb985c7c91f8a7541dad5c3be773fed940c41c3cf888308829f. 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/DKBR70901408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09359ca05b29b163eb438a8d576d93dc262a471bff9bd13bb20fb779f1ccd3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKBR70901409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d976a1e2fa36d3c2a5c471a5ba193f834d294a69a82f7b0dcb672aed0110f93. 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/DKBR70901410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835d84bf91fba145d650c28e610877b812b4ca65804c9b4b249413f0b54ec72. 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/DKBR70901411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682767ab66b3c33aa4bc09b9cf4cbf6f059b07a3b72559c1f13556d46c901336. 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/DKBR70901412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752710e71e4b6891b15d1c50251462c3596e9d867ae2c4969854d8d2d41d1f4c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DKBR70901413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8ced3834c73af54e9119a37ee76cdcaf4611a94e683de15f3ec348eeedd24b. 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/DKBR70901414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f27dac3fc2497f45e0c8c723ba1d64f8916f3bf27fb3321c2f8da424b12db27. 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/QM6N22592798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90989b28d4756c69320a123cbaf4f25ae08785b4de5f28812376581c437dc1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2442744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e68c402f6794bbd297326a39b59a1a30949a933132789f9366cca73567b720. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QMDA62408667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250319b315f1bb83fa40e923a9e0f839e8053fc4b0e87a1ed44cca4f1b7ee4b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKTT21100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb131563da05d9c412368f7d4619f09bc55a7d47c3fb91eac0b4ea067bc38124d. 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/DKBV71002112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944dba427097d1947afba79f9255f2ed7abef4765dea2253ecb97f51e8ac0165. 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/DKBR70900201.