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 0x6fe83b6b4bf886b0f2cd91ea349f844526ea67b6d37a43b36fc2bb8d26aca820. 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/491b7372-33d8-4daa-8727-00cfccbae652.json and https://artists.proofprofile.net/proofs/artist/491b7372-33d8-4daa-8727-00cfccbae652.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 0x21df166b20b1b19a21fd5c1fccff95815af38ba724c8fe159aa5f0fae293c0e4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:12Z), 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/CASD10600726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbef6e4227499256510eb81b3d42331c6118bce0c1d54cd0ab818196c007425. 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/CASD10600729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe12fa111de3bc74350911c2f8818ae89182ce2822ef43a33a9c6e6f3ac8a6b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CASD10600731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3005dec140180a13d5872b2d0c7430efe76cc326a3da1b1cb7b8e78eeca24527. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CASD10600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7145ab3693f3895bac59c86ea31e110c63abf138202c0a5bf3c91a6720c73caa. 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/CASD10600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a328a2e352885e7aa587dc5d5dc1a4521f9a9adc736d9006bc0ce2b689b01. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CASD10608589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f0cdbfcdee1aa63297ca2f8e93b1678aca2da762830f588141d903153beabd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CASD10607789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066cbb815c9c614b584e77e6d83a80c79df1aae19fb4e4b0e7f8830e4ed7d898. 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/CASD10608590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb39d22369eb0b0722c4c3150bff35785c0a3d491ac1353440cc13462cc520d5. 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/CASD10607790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86138db75152e52035ebae57c933561a9f249e87fd9baf1ef88f3e9b1e34dc50. 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/CASD10607791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c816662a90442256944d26e6a510131f44eef3c7ba816117db6b632681dd097. 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/CASD10608591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8afdb05ed5dbec7fe6c53fba92b9c793b55d33fd95a6159772103bc27ed074. 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/CASD10607792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10770bdc6ab857c51665b537e704b98b6a5585ccf6a32016b352b46a55526a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CASD10608592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cc8c19c04170d24dd0e693dc55cedde434b75ac891707b4a986a366e35ca80. 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/CASD10607793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9577f3eec82d82471604f2e6133a775e0ad6135e56546ab08cf0ab73a95a8b1f. 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/CASD10608593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de5492a752a915e1464652a4eb601998bde9ff51494e0ade112dc8b3a37634. 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/CASD10607794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8073421ed64961e8fc2c18a6e02b92e4de4504d502106d563a9e6e36e79157. 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/CASD10608594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6883e29ca162175de83bec92eab724525da132026b12e0ee4f75bb1b99851bc0. 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/CASD10608595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd48dfe8c9f83c1e9f9292c13579725d2581b1a5ead23755606077af76fe13a0. 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/CASD10607795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf08ac06dfbf63d1be530f80d10ee05ca0f8c433d4a63813043e24bf1fb1d343. 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/CASD10607796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b2a71d1eebb1486c6418d45e4ff4be260671589052993f4fd19a3351dc6768. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CASD10607797.