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 0x2a38adb9fa8728cf20853fe532c245107c237513b628ac46ed98aef04b72b6d4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43a2c9c1-b8b6-4f93-866b-5adb10407d1c.json and https://artists.proofprofile.net/proofs/artist/43a2c9c1-b8b6-4f93-866b-5adb10407d1c.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 0xce771c712a2ec6baf098e0d1a3fdd01c7ec7efb6679d91aae17292e25cf7059b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92322099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05754157474c4d05af9132f1af2b1a91eb123605ba25dbe08cb5fcc70223315. 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/QZMZ92322101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd809de3c1987e4fc18b8165c8946474e4ddd8ec60f3053496e1a0d54d9c0dd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTVM2399318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd3f1cb7894dfd3e202207039b4ae20c53b609e1e366819e553d61f7accd4da. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:53Z), 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/BXIV82493840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d0e754a567d124271f740e54a3966e95a3c7c184067fc00356722c9b8a684. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BXIV82444403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69591316d6a8c8287a1c23a97ded909f131ccb0afc0b331419037c22791bfd6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BXIV82462182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80110f2b5b6ae98f278e8b88efe65af5ba3a45d31f60a93e53b06106c7c1ade9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:53Z), 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/BXIV82419094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922fa282b569ebc7e7f1b5269abcd867f9bffe29336c9dd40a405e361481b78a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:35Z), 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/BXIV82410696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211b195048ad3413516d6a0c50debfd69c6fffcfec4d1aa2848fa879d69e629. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/BXIV82474360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733ad3e30e5349c8013cd031e39ddc9e12fe0e4792311274ecdccb91a1d5c584. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:59:07Z), 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/BXIV82472600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b43b9cf77071e6504b80687e25a93988a9e08429de4e0416217d8395024460e. 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/BXIV82429248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801cba90a3fb556003f98b73c864b3b5768db1bfe17eaff48eabfc466941bbd2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:31:46Z), 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/BC6M22501764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a1b9902030a719222e98995f951760ddcf41dd7988fd71356dd785e93c77c0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BC6M22508062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bba3b5a1725f809fd395d5fe086cae8a63e317ad8d9c1fc93455da74aa6056. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJV2575300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f15dbf193eaf1b5ae1ea9dd101d1e6f17239282a5772037f2eea262f8119f28. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:14Z), 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/QZNJV2575301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d5ccec4ab091c82490ffb4b4c5d121c48171e50af62655c320d7260dc296e5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJV2575302.