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 0xb5da61cec4a32f213004a68459f4b1c9643b1c7b7331d6028538e386c0d437e5. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb8e74b0-618b-46a4-842e-f90432aae00a.json and https://artists.proofprofile.net/proofs/artist/fb8e74b0-618b-46a4-842e-f90432aae00a.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 0x064d04d31dc31a77a2a10ee9d446a99b388b74f5bd5931c092a6a7d3a7d8e1d3. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZFZ71951797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c56ff63fc88dd87ef3c3093ee1e1551b8bac1c0da565ba07a1a353dbeb4bf1. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:56:38Z), 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/QZFZ71991206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a72e412b351ed3d9fe70221e6ce9bcd0fdf575ccb437883808d3c637e4eaf. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:53Z), 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/QZHN91901049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc03429d198433db2f8186db43a70c2c9e0a821624c577cdc2c955336da5ba8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYX2051892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbb8b471a9ab7df6fe55393afcdf41f63fc591abbdd3d569684fcf46c9ac904. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA62080013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fa25f6338fa7ed0cc2e85dc16183ea69351b30df9d4f1195571cc57a3e631c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEM2177591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171c69e580cbea608dc1c33de9690643b5c9ee1485b703dcaee3c1734e6c44d7. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZNWT2140746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0376a5f4a4c7c88684d0a95a0c163f8fa1909cc55ece92b0b20736cfd7fd5ef. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ32297743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808cf2ee525667c512c2838f978f261bdc7e66f9a995411fbd5f9a53700a3101. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZMEM2281050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc732a744014e22d2149e8c4b3a7f7d76d1c7a2445d63a84d3aa0c71b5f3c97. 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/QZHN91904434.