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 0xf4ba45badc7e0641f9e13beea8dbdb69bbe471760e794b2b10780539912452c2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/619bc926-4590-4ece-b12f-f0e8a3718afa.json and https://artists.proofprofile.net/proofs/artist/619bc926-4590-4ece-b12f-f0e8a3718afa.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 0xa8aa0c379e7225aea268557a2cac111c81c2afbcdec12be32ed6a043eae49815. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GB6ZW1500520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f422bc99678848dc4737aec2c87525fd38fab549f35862fef5bc3db77e10c37. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB6ZW1500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c1abe31938e600476a5561aa8f9d1ebce66aaa6f20dab3f384d00e3462cdda. 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/GB6ZW1500522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef29742438d6cd92724bf71216c268a9da1e4722af2ba64335ab5f0a9f050a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GB6ZW1500523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8575375b4cde9b27d1955c44954f4bfecdd0c7dabad3fa28a895a99d689dac9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB6ZW1500525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4305d66ea926d2e59723c5b2132de1c53ba713cff7b87fb3d7148409a5ff57. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB6ZW1500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d771793a1b9cf45876fa789a4f5a18ae288f483c10811b10d3d1d3c9a3e1ccc. 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/GB6ZW1500528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7ee3722c908880528eb4a5568aed65aca4f7ccfd26ce65a343d7e06789583f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GB6ZW1500533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcee17d3f76a5465e23ea813034ea9bb006c0b089187706707fc4223168576a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GB6ZW1900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a512d473677c0e3dbb2cf691c7ac6ed6764a21f02df5fa23c23fce3307dcff0. 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/GB6ZW1900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149b7d8bcd9166129cfe8c270dc4a697678e5adac22ed36d0c7f0f94c7306246. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GB6ZW1900136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2133f70535c0e4acfc5e49dd2d0f46ca2143ae665542fa5a90396fabecc5549f. 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/GB6ZW2000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f688e7bc58d2f35a57617a6b6ee892c4fa2c3165345cd44c47a5f4c4e1d285. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB6ZW2200649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce183b8d26c508246108e91d25febd8932594284ae4e82e55684e7963af7606. 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/GB6ZW2200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538af4d121f6ec4256a4d787dbddd9a88fad365ee6df1e9ea288a5200017df9e. 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/GB6ZW2200651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1071a294fd54cd034c47d187f14c8bcbdef5bc79b0c3fea3bb3cbb51889248e5. 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/GB6ZW2200653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a3aa6a246a6f6bc5150349d0d79ac19d2bd5514d14aec38990c35ad36872eb. 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/GB6ZW2200654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6acf61b97a00d3516cae014e547217567779533a3a6de8d0a4ce35348b69e8. 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/GB6ZW2200655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9adfbf6e59a65af97f6dee2e7d820e6b49d192c7f9d770c90ea8be041ec065. 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/GB6ZW2200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a2382281afb584f9ef2ef84de7c63d3ee78fea365de71881e4cb59b8c99924. 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/GB6ZW2200657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f50b43de8f04378ce658f5559ce2b8440cba3b07a3336c4394ca7a821286d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB6ZW2200658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4e105a56e9fbca41d545fe2ed139aa30c76b9f1a3e8c295e785766b32ee075. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB6ZW2200660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b92dcd55aa6c924eb02c1ff7fa4b9a281e81de8b416a388e90654c5d415d537. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GB6ZW2200659.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9872d691578cb738caf9afde32760302597a89ab779c51ca0fa15ded01e7d33a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB6ZW2200652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6652fba3351452a4966858cd5b6d7ac06893ced85b09f334331c2620ededc. 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/GBGZW1300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830cc0cdfdd0bd3ad3cd5b98fc0c33f39e2a04110a90c82e7862f73f3179de7a. 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/GB6ZW1000009.