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 0x061f874a712e8e27170b0c5417d218866bc576eed7d36792aacf97dd236e79e5. 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/9441d33d-6d93-4291-a8d7-ed2682ad8ef1.json and https://artists.proofprofile.net/proofs/artist/9441d33d-6d93-4291-a8d7-ed2682ad8ef1.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 0x09056c2b75659d93e444dd80259f689aa53d2508527595920b7d010fa8650755. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUA1H2404799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e3ac4aae3815bf802fd77b1f9f2e2cdd6feef26832680ea7a1c80552c5b4c2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USJ3V2411534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7aced7ae38f39701c9a8e4dea8b89187fe79440039b960f05190bebe3acd73. 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/USJ3V2411535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4313adce4b1815e9aa0cb9a0234c5d954ec9751491cd9be499318d590aea470. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:56:11Z), 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/USJ3V2411536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a1a78603b5aa31f3160863469463285e1d21d36b3195e1508f3f2bebbd8269. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USJ3V2411537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa67781e1243490362ba7d6735771cafd15a8f0200d11214686c325ab9f9696. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USJ3V2411538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec302d00979cf7d75708d2c6f2baeb186d8a8dd156550427cf023314ee6569e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA82485541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78159a874472a26a0f376a779772bdcc66916819fb943c13e7e4e9210107f5ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ432303749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7c0a9ef889b035f1d5b9a7903dca1389fcc1916b188e2ae5744176bace47bd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CA5KR2434639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e32c2c01f67ff45f55bf812c26e2f617a07295a12e2ddec8d6fae13f259d70e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CA5KR2435139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f0c08a43696d9e5e1b4abad277178fa31d6d7d8bb6dfbf6a7fdb5e2eec98b3. 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/CA5KR2434641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c2c39c31615d29e5ad2792c9646554dc087eb64973d79a49aebff63eb2a68c. 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/QZZ432308062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10164985bbc7a0af03379e0b57e1aba6d176b5dff0f9ce6a217404fd01979bd8. 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/QZMER2411068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0bf5c5526550a858ecae75e63fc0632bd4471ae1dfcf65457a7da14690f6ae. 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/QZNWV2459179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5f470259444bada68d4d39e57815330372a424c226db187aab8a574a02ecc3. 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/QZNWX2470524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad065803bd7572bab6cfe136e6017f4af5ee38a6309b6c83f0afdd11d2ee623. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWZ2468745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc93223f66b9e04ed4d2076accab48fdc5f3cd48dae79474a3f92380315b37. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZRP42411371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc930a060f46d3809df0f476045af0ef7eb18cfa315ba146d2d0b43c98f7e10fe. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAS2438786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc5206c6305ab092ec09bdfdc459ea5ff7c31624bb01b5dc6705df860e8ceb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAW2403942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650c25352822161000a945485702173dfe9656db270c51854f48292971d9811a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB22424343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf853aa7010f74a3d945d1ce12ad580c25c189e3de11c1b594497242ed84f3afb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBB2460135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2131c84c4eda5f685c0e1140f8ebe9147dce1cb5a9b19644d15275d8464b88e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTBD2498703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86483161dd5146457207521ac05adb450df71aad19016f58c0e30173da951e6a. 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/QZZ762438262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936035e2313bd31aa332b4fa77dc91cdae7cf03aa28c9ea05e75b6fe324d150. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ7T2466406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bba368a8688ae7ce503d599687d4d178a2c4f478b30d75693c06f7929601681. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFYY2536484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909a4de076665a977cd94e2b5d23848c640da19b14c002b23ab4a84beb67418a. 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/QZFZ32563735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc22b5893637d188a03254ca8909f25edb4938e14474daf836c7b60085ae8ff. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:44:13Z), 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/QZDA82519892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b29e5dfc4671d82fa6707fca9db5f804427db3f5c4ec9624f8480f972b106d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES72542967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1528f75fae7c2378259fd79f6ccf915d050a04307159f5af7022e7a989e1ef. 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/QZWFF2533335.