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 0x3965980a8fd4af6f08aaf75b759351f35e024309de670aa1fabaf6da9cf5cce0. 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/df3df4a3-2c55-42db-89dd-5a1b0015dd97.json and https://artists.proofprofile.net/proofs/artist/df3df4a3-2c55-42db-89dd-5a1b0015dd97.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 0xa5c1ae978d0612a6614449768d01e84d09f0c7e1a8c77537d4b1260b40c22242. 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/TCAHR2319031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75edd411f2a5910379a9f6375da997804ca5568b2f85a3925f27692262496a64. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA052489651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca727a9f08ed290e7c3c993759931d8099ca348e3946fb75ec81dcc0286165e2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:16Z), 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/DGA082408983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3355eb0772448e373a0f57ed4fe6fcdb4a6c42d885bcf5559f6a5e89c084b8. 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/DGA0P2447081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e11c4a0e8ceacf853c041e09d486e0dedb4fd6007477aac51e6041a215bbe. 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/DEZC62457664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cb84e39eba0295197e477566ff7a588c0bb79a1baf95965bb4fb1674870720. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DGA0Q2492672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c04209288e9a531c413d0c39311e22b18c720b4f175847b6b00804f80d12984. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:47Z), 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/DGA0R2404896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecacc6dd4eb4446ab51fe8fa2244f0f319df210078aa5bd425ac2a7f5e143c3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DEZC62461804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565b85f6955741bbc6b04fcaa25c7b2605148be2efd4c837c3de7ec21542010b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DGA0S2419356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4003270b69d3dc0faf941610e917c69a2714628c95076c6d18a9dfba0b63d8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM3DF2414972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf84842d7fb99304e405ab86c6f43f534a00e7cb99f9880cc35727af653a698. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DGA0S2421307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568efcb49fd98706a81bde2e74f1db880be7315ab747009ea5cb364d647ad61c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF2502001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9648113f5c8b391e95d27b2cda91dbbe049794805294f92da67623ee801faad8. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZFZ72533488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473e72eeecdd3df84771d1f41be7245efee82564a4d7f9479fb4918b2fa0fa5a. 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/QZMEM2551058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4d21195e65e342d10ec8ebe9ea13b854713c8838e325f0696735263b1adef9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAZ2534741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b46490410ba686109607aea22827fc033ef1524823d9368447f1af1193e88e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBA2572790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd7fb30d187f3b3b2c1ccd19f704cedb1cf4b5571e89ad9ee067b11b389207e. 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/US3DF2599923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c51aed329d680cc1fda826b4deb2a98c0a8a061ac5b8870fd44d2f3a8cf31. 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/DEZC62507943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d93ce39c3883a1bcaa7f4ea3972d952e879c23dbbc0efdcc5adb1f0d247cb4e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USANG2517843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3e436c6e93cc9a28c6fcdf2ddb62ff07eea5026be222e1f8b88f61af995bdc. 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/FRX872595543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ddf4aaf9cf256d76f68d65dff7dc1b42acd13e40105a76bac916a9da483b6f. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/DEZC62515245.