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 0xc713663907a940e13a2d6be7dc4bdc49994edae76a57db8fe29003d0dab24ad1. 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/fc9d8d52-6461-49b3-9ad7-91be6322a32d.json and https://artists.proofprofile.net/proofs/artist/fc9d8d52-6461-49b3-9ad7-91be6322a32d.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 0xc09ebaa268c15bcdbd65f7b892304c9722ee0bf8407eba4acce9791fb4412b88. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:37Z), 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/QZAPG1755551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d566aff1cf203c9463853cef629d092a6c3b7171a13223543af7b25e071611. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZAPG1750002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3212faf17b6597a90edacabbaba2cb98888a9277d8dc9a201fa436a6e0c106. 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/QZDA41884278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193818be9fbef2e8303370743c5399a59353206c38319d729816453420ac67b1. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZDA51857708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8de5d9fd59d418290ddde17a2743a05a4cbb85aa583a59540baa80031513b21. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM2PV1816416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887c36496d4785c19b486c563f7603047e1be3bd649a75652e20f098d290a018. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:00Z), 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/QZDA51989166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3ae23257ae339769c5ff793f28b546f36bede2136fab223056321118cf902d. 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/QZDA81998364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194c0c21e218b0501b31d2c30daa58547d241bf7202b4c20fd3387d1e13ced98. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:08Z), 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/QZFYY1924207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1562c280b8521f57b3987550c09b21d9c86b81d6a68119081d91784568c0a6d4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZFYZ1959257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc89645470dec6d91cf7604c1a17903fd3fc2e56b7ad381fc34d9cf1dad8b73. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZFZ71988963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1828ffec7ce127ec26c432b8903fef5acd6006c2b3b33ec02f4b6f9657c779e. 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/QZK6P2040040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b2bcabc1c2d6f141f012844161caf183e8f5f1109d2d2718474a2ec19c187b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFZ72152464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4143e5d46236eef5c706336d5564b64d0b5ce16665523702134fc935fed9b86. 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/QZFZ72152465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad4823b9704d9a7bea3344bf0cd724faf5d69412dadc42a7f5c8323325d8261. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNWR2173181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ede0eeecf0c5d490951fb3b14377520143edcdcde7ef8132aaf75a15d40c5. 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/QZFZ62395542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378360409b2710c9c70a87116a5b56c325ec87af87e54fb87802b8c12138482e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92319992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22069fa6218037a5b028f99f0d93b5cd69c8cdba31eec99377ed59ff849f154d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:51:55Z), 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/QZMEM2308636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419b7a61e269c4f4aa88b99e67719204c1ce894f446085fb588740d5695c24d1. 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/QZNWQ2479463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784574512849ed482ddc2f302a1b80e60bb6f6722741909602838844622d1b85. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAS2439026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af6ae02ad0f320f1a8d34c6214877d6fb5c3ca50f23d27c553627a153c54445. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZWFR2476782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871e1cc9c27d65a40922365afc44dc72894025b6d8417a634e7a90ed6c1032ee. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3FG2515986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ddbc69c776337284084ed66c4bfa92220bedce7f4593ae8a28caece79ba4a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT6E62576119.