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 0xcae9009bead7828ea4d004dc01dadb60a8e1efebd6f3069caeacd9ce421da8d0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30c2fea6-16ec-463a-aa7c-2fac1d83eb7d.json and https://artists.proofprofile.net/proofs/artist/30c2fea6-16ec-463a-aa7c-2fac1d83eb7d.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 0x2064396b20823341b005f957f69994c63f279c327fc06bbc291969159b0b5774. 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/QZGLS2127825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb516dfe20cd3954d629ec68962bcff7756def4d960dec4c16588b6fd4ff75506. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCGL72100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628fe60fcce2372d8701d2756cff63e8cd9b6ca08c153bba4fb8f7029ca3e3f. 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/QZHZ52062352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacdcfffd643c1a70c1827d813df90d82143d3476c960393f94633a339f29810. 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/BCGL72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbe6fb39fe4ef7b372ad1bcb2b7d1b6a508d4bf4c54de5ebab7b22bfc386909. 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/BCGL72300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b48c54915839dcb8c66e83d93092dda8edf33fdfd550f9c1a5d844302b26628. 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/BCGL72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ad666d2192c0cc0e6d7d38dcc3f1efdf777a1194c2b20fd0199b9ac78eb894. 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/BCGL72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb247ef73a26698acbb9643016992f46f134537b4571e201f09b92fdc6d3943af. 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/BCGL72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ac640132e5cbc9ce779c061a8adafb2e0288047d4487c9e3d73ccf25c13d5b. 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/BCGL72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fcd49caca774aee45631bb506b3d3407d5e1492e42958b1a66cf58b7801c9e. 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/BKI0C2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f79962c6b99fd517293a2bcaecfcc36fc8d1f3a7e3a9a80e42131bbc54749. 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/QZGLM2163084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3f4859cbcef5c3ee0ffaf7ed201aeeac990e18ec0acce32dab9c7b51814c9b. 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/QZNJX2032867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac318e3535f73f5b47a22425bc11da5d466eefbaa71d870295c550c09fd79746. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US7VG2013750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a828a0398a50ca9538d050b9d7e4f5bb91894a89f0f6ee49c1f457753b03d11. 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/BRAPI2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628fe60fcce2372d8701d2756cff63e8cd9b6ca08c153bba4fb8f7029ca3e3f. 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/QZHZ52062352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294f62a5e74adbb0086db811ecf00489b4b3efee6aa6fe580dff718aa347d3b1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJW2030596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a828a0398a50ca9538d050b9d7e4f5bb91894a89f0f6ee49c1f457753b03d11. 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/BRAPI2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac318e3535f73f5b47a22425bc11da5d466eefbaa71d870295c550c09fd79746. 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/US7VG2013750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6728a10ba26d32ccbda997bcf73dc867e7574d69ad5e93d1d3b1b8f6d2bb60. 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/QZHZ31951780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7dad354a5ea66fe25233d2922b00aabda9b1bc4df749bb36489a82d3c88829. 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/US7VG1870253.