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 0x3495ea5981d033ef1bd4d358dd954e8dbc0fc80827cbe5f354f9e7de75c599d8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c255494-56fa-44f3-a1ab-5ef0e48c2311.json and https://artists.proofprofile.net/proofs/artist/5c255494-56fa-44f3-a1ab-5ef0e48c2311.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 0x6b749d6dcfdeeec4357cd8818e798bd0b255c563ac845e0c48d6eb2695eb0c88. 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/TWA450893502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b48fe36e3ce4b2dc213ebb32b8472c9d74bd52749dafd49c86114cf3e15cab. 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/TWA450893503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b4b76d41a4554ba285e859c5f41546e97cb4a5677be6890952171de45a60af. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA450893504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bdf743eb855de4dc775102b4c20a9540d90b5d185acc663357f4c53537d352. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA450893506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1725316efaafdc06c8cb11a7c1deeed750e0f37245ddd5d09df2287c1abd434b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA458511906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f26699295096513e0dd431c4a7f2c528f789d53998bb1cd328804dec386a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWAW18800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9008e04aaab8e9fde13155c833e045257ca78bd37e6435f2f3e6f4a57574219. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWA511300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bb8476b8a0d9f1dcfe2bdbe501e083af632f61a2f6ab1c70014ddd1c9d692e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA511300524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ed06469d244abfd9695cd888a43b2438ea051441809bdfd5f68bac91f88d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA511300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7008cb4c29ca3a105d6ab9b4f8e41670b4aca8022a79539577e81e4606b006e. 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/TWAW18800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ed42721f3c07b80d7cf6c99b99dbfb61a7878336c7ddc3012c81d68144f9d. 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/TWAW18300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98140e707df4fb42fa99922a36a7bc11d46f557bdbc1e0a2b36b71c64dea2d9. 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/FRX281936916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8b592663cb9dc24002ac8d4ecd082cbb1d4d077da3ec5b3fe53376e503fdbe. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FRX281936917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618264f0c30c427afe2c5d36dcc40d59ead4a78e840b94975cdf34b270e442c0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX281936934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d8d16e40f4075f42ecb239d0b215496ea3481adcf7d71ae498a79f4eec0bfc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX281936923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e8c6e1aebefcdac1d0c8a1c734afe6ec5ccbfa1c6f4979d826660a8e1e629e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX281936939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacd3ed06f8d93906f526e28af11ff8971e48f5d9eb888ef5db37d446f736bdb. 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/TWAN77390167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155a9f206c3d66d0c1a7fe8ef079f6bea2de1da41d1dc0e840d2203fb7c936f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN77390174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cd78512c6110f6d30afe5dee02d8eaada8b07a9d14c2e774f9dde48f6180f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN77390178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e477f3222b6dd229abc1b32c3f00162cb06f73b8b8db48c99fce1adc26794c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN77390121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb893c5645c9e8211a98c72f7286f31203562e0e8876fb4ff60ba01ea45799. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWAN77390125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9a77dc1aa6d925e2245293ef7f8105fb3f06d876060122351531b342f69543. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWAN77390130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec74cc9a3f0e33227dea913f9870224e027025af7de4ff24972f5d15730253f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN77390036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf65c74833ebfde873db3de96ecd93cc0c3d354e35bd2bedcb304be95e09d3b4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAN77390040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b36730f812be0e706a90b92234dc69fba76db7ad6631f08af859e91c3d4284f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWAN77390046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d83527aa87aff923dccbb0611a3aa479d1f98bb3a8e3d8fa5bfde414dbe4ff. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TWCC32122689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121ba1dd306a0d440fece7b179a704fcd555fbee17b42371ef8baf75ecab1a6e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWCC32122693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d80a84b6e53b2010c4ec46409c51dbb5d4b9a699df1412f79b5e77590ab6493. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA319700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edb88f12c8a8268d90c0fa5a04a2d663b69148eccb595fd9198bdccbc87609c. 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/TWA310507204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cec2837e8879fc77b0e2319bde2da443ba27ead5da66c9ab0830bcbad54e5f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA450789901.