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 0xce28478dc53fc390e0f651771365c988364c59585c9b71b14f7144498387df81. 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/bac55216-1f43-4e56-8e16-7fb7862d9485.json and https://artists.proofprofile.net/proofs/artist/bac55216-1f43-4e56-8e16-7fb7862d9485.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 0x1801642eb8fc7b49055230df9df1381bcde31591486180a8c4f1b370a113a84c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZAPG1735435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0c6f83416512722fe04ac2a4c565c728c22022ac2c178a01c633a772e7fd72. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:00:48Z), 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/QZAPG1735438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6ad6bb7216de7fabd1c2c8955b76442ea1c2ae4c44f60b398d10f9e32373b7. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:23:47Z), 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/QZAPG1735439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7926407a7be067390b8dedad279b047d57c969107847ee6424f2e354f6f5fa0. 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/QZAPG1735440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0c5f0a68652b1335b7e714ec304b5809c6eb97063b3da5f953b6911067c405. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZAPG1735442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59da44800a1fc8e322b2e799fd25204512e1fa6ea353734828b24734885f024d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZK6N2030393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4058dd860d0615d816496514f06daf741166382bbb2e4d00660f053a273a8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZDA72129396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f551c432cdeafa8ddc54b64c369106c379f939081f23c7e813d85e71f6cc29. 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/QZFYY2145419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120f3cd00bac99f2bc18c48d882843d89615ce0c8dbe9f562daa80e698e827c4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:39Z), 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/QZHN62125463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c4832a4a3111fc8dce488ff953e995e0285f45bef71b2827716b152bfc9cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWX2097085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca92f64ab11a0f3a46c0d18e60bdc92ae6401d72baaf34582238de42602eebd. 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/QZK6P1934002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf438024006b1206a51c2cb728bc5418dbbc9f7188589457420ea9b2d09550bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92081697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6890cbde9d3db664e3e31a230385aa9822267005001b92c9c7b6a521b5c2f34. 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/QZHNB2189474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ff6a7b9385bea7bff6815dd8f43a7365e97c502bfe2cfbb787da7b42550f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:43Z), 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/QZGXC2100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c56e810b11bf13ac6df1456814ff1e0a763e9db24cc4e25ddced8eff8daac3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZGXC2100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c56e810b11bf13ac6df1456814ff1e0a763e9db24cc4e25ddced8eff8daac3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:24Z), 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/QZGXC2100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd0b190517f8c180bca825b63a4ef1aebacec7c631419d08a5a86897aed929. 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/QZGXC2100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b52f8f48ad4cce8ede16f580995b418dac5b79c45dc7d4f7d6806fe649b5ea. 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/QZGXC2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc8b01f0e1efe119d4dfd98ad3c95c2df795866ee89a53724cc5c60768d1851. 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/QZGXC2300539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbd0a2927befddb8dbbb991aca82d419539b46f3f55bded07b9859d956cf1fc. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZGXC2400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3d0ad7b4b4cda6b552ebdaab93eceb79353c81b39408d25fef30036f771da. 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/QZGXC2300864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d12d1bbfbf455a9f34d2ea4bafca5582c8158196d8decc1dccc8624501a7d64. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:35Z), 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/QZGXC2301150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e78d7db7cde264fce7659c9b25cfee4fd1100620105dd5874227b81da249b4. 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/QZGXC2400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fbd667a6d64274910f089bcc111483bbe3b1310958cf7e68790b0454f17deb. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZGXC2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612501ed4d87c886f9c65d0852cb202778046c2079138c96594bdf158527a434. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGXC2400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fbd667a6d64274910f089bcc111483bbe3b1310958cf7e68790b0454f17deb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:06Z), 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/QZGXC2400073.