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 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 0x44f12663af5569d1f3e5f917d5b71c0367fbe329f8f89a03f89bb25365e41347. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6769d657-7061-4bf0-83a4-2fb167bc262d.json and https://artists.proofprofile.net/proofs/artist/6769d657-7061-4bf0-83a4-2fb167bc262d.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 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 0x8d0a8180f9139e851ddaeee3e00ec772669091bdcfcedd180a413643f8ddc88f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CASD10606571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71f5a51e9977a1cf45b690c3917e88b9f4e9adc27a8ea371a4e94686bfafe10. 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/CASD10606573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3005dec140180a13d5872b2d0c7430efe76cc326a3da1b1cb7b8e78eeca24527. 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/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 0xd1f0cdbfcdee1aa63297ca2f8e93b1678aca2da762830f588141d903153beabd. 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/CASD10607789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a328a2e352885e7aa587dc5d5dc1a4521f9a9adc736d9006bc0ce2b689b01. 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/CASD10608589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb39d22369eb0b0722c4c3150bff35785c0a3d491ac1353440cc13462cc520d5. 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/CASD10607790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066cbb815c9c614b584e77e6d83a80c79df1aae19fb4e4b0e7f8830e4ed7d898. 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/CASD10608590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86138db75152e52035ebae57c933561a9f249e87fd9baf1ef88f3e9b1e34dc50. 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/CASD10607791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c816662a90442256944d26e6a510131f44eef3c7ba816117db6b632681dd097. 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/CASD10608591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8afdb05ed5dbec7fe6c53fba92b9c793b55d33fd95a6159772103bc27ed074. 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/CASD10607792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10770bdc6ab857c51665b537e704b98b6a5585ccf6a32016b352b46a55526a8. 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/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 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/CASD10608593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de5492a752a915e1464652a4eb601998bde9ff51494e0ade112dc8b3a37634. 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/CASD10607794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8073421ed64961e8fc2c18a6e02b92e4de4504d502106d563a9e6e36e79157. 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/CASD10608594.
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 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 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 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/CASD10607797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccdde67c7c057fcd79ed9af9452369bf7345c1f111d5300f80de063ce6348be. 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/CASD10608578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf693072a7128c76f8a5d783e19377849ef5bcd127593742d57169aefb3ad8fb. 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/CASD10608582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305de1fd04b34b54758f7c239fa6736e5c7d83c448c32239bce92ddad45d04aa. 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/CASD10603771.