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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 0x8e416de68dc9920a3039848600359cb7e3b91622f43c457d020f675ea4f47584. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9791717-92cd-441c-8cee-f117725b0c3a.json and https://artists.proofprofile.net/proofs/artist/f9791717-92cd-441c-8cee-f117725b0c3a.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 0xe464f7e07d595a569918748e515669840f28b11adf8ecda2c27960a9b47ce3a3. 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/GBUM92300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcced4ee2633916b4301169a77282a70ec1c30a97e151c9c85fdba174c783db50. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM7282429928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc032047eb72dacff76c10ec9edb2703c5b543d65a4ff76291a07567eaea60f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:51:36Z), 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/GBKQU2481231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8572c012c3daf32d1adbc0cb17338dccc297d7a089cde8ad0766c15fe7a4709e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:18:07Z), 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/QT2VB2419666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed69d6fd0e8390fc7fc7959c4d4fbf2ba5b08d70856d9fc7c50d6fa51a170f6. 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/QT2VB2457014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e9c9f3cd9254ef02ca3f612a7dbca7316837ffccfa991d8f3a6e312da59f9b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZEB2403969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a67f6558ed9504320a8eee824a209266350d98978c51c5de213051b3fc2bc4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:49Z), 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/QZZEB2456964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8527e182c32993d078ae0292ec404e3a5cc9ee69aba888f0c4c36a354330eae2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPEW2511892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39db5b73aa87370b7750a13e1f356ee0a2a2efd67cc27e2851882aafdf9f4885. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPEW2511893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5103dfa994a572409f62329f58f7cfd17bf9f5f4a0e3822026d09a605b485803. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPEW2511894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a67f6558ed9504320a8eee824a209266350d98978c51c5de213051b3fc2bc4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:22:18Z), 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/QZZEB2456964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e9c9f3cd9254ef02ca3f612a7dbca7316837ffccfa991d8f3a6e312da59f9b. 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/QZZEB2403969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ac48c8dec512b86d631f68a0088c473eb676a6844b9db5e1842e3fe8a48e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPEW2511895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bbbd962d257c0af49d4de7ae853b8a3c157ed9a747dbac6459afad04d657fe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPEW2569184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7aa4f1561afacfaa47eb9a2583027ac1146a93ff25cff4e4f885c340e529cb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:53:02Z), 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/QT4K52552968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ee7d9503c0469ed70fda16db3c1d617ddd6474c6c880f6dd75c2cc0e828ec0. 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/QZVK62300021.