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 0x830c736238e8e92001095963892fdc01d2fbfaa907c0a2236293c42458259c9c. 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/bea9deb7-61a1-4bab-86b5-e1be1cae5361.json and https://artists.proofprofile.net/proofs/artist/bea9deb7-61a1-4bab-86b5-e1be1cae5361.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 0x0d0c3a176bb7c307bc1b34bf36229adad90c9e68b03d893fed32dce2081ba489. 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/TCAGB2299343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dce0f211052e90f721f20458edfc58ed743bf5eced6bfdc919160b8f9867c62. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAGB2299365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5e8793407197d9f149ef6c79ae46eaabd2eda2fb4e4e0268981ace67344a6b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAGB2299374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9e48b376e6a9b070252748162af48ac6fdb1072faef2bb4e1b09ab533e17f9. 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/TCAGB2299385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a8519055a32554a032b51e954c406cb85aa55c31bfd07e7e3da7ea352518ff. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAGB2299398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81be5fca9c9ab23be31d7ad6d46dcfcd78646fb3947cc9f387159e63f6f77350. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGB2299406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8706d11c5dd1f28b3c7dc966e2dd689499f1ecd80eab2725f9b2207523d3b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGB2299429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d7685f080a38900804faf1ba450cd0b2dabbff80cb56aa9d98ede5605266ae. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:56Z), 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/TCAGB2299435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1ce7a1546cc7ce81ef88ec1239d19f4d7dcc1670d167825bd546955a686fdc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGB2299444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f82c8e78cbd5cd00bd56f74998fc363d30ff4b1c81415fd147da1892075e201. 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/TCAGB2299450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e7912d77dcb960e3dfef53973b76de3d13693493685aac9af1bbd7bfdfe898. 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/TCAGB2299457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87b854db672c38444cf725dddbb31467e699e63482c7ecd3fd188af8e55586c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAGP2204455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f2f5f6420d01c4c03f53ca832a4fba6f3f90b0720082f53c7897366f848dc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAGP2222915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecb38044d33c6d018960ad252298e1a2329ca0a226596dcfe959cd42433437d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGP2237066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d1699e44dbb5ab56d2851b3c0cd9b8b7355d19855e669806f8ac1ae5b952aa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAGP2237108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab70cf2b367a545dcc07ee2d2b43d7c6b968776f17bd1e2f0f39055d75fff8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAGP2237262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525809251e8d787f1e41807c2aa317719571fa72fe18d7ed296e1d535b2a2ef1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGP2237284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4eadcb2f76615a824a9d30e36d18b5d1625de5ba1cedd20b0085e6a51d86ef. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAGP2237297.