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 0xbe7d9535d5706b2743711cdc81431e3762430e898419251572c1d8ab57f273ec. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcd19bd8-c73b-426b-a414-c84a514bb2e3.json and https://artists.proofprofile.net/proofs/artist/dcd19bd8-c73b-426b-a414-c84a514bb2e3.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 0xb9324743cf66ff5e3b0f50a43a2e0bef61927b7ba9a6d8be3dd408cbd6c037af. 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/QZNJY2430328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b96a0063937b8b8ba3463dc2f9ef3fc17d99493df445a314ee03c49a3426218. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:23Z), 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/QZNJY2430276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa2a0f0ff7b6cba8cbbadc334674c4dd24ba0371d77f27b31fb13fcfb97c41. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:38:14Z), 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/QZFZ42081569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1713c827e9b146740bc7c78ff63d291698fc081e7b020157d6bb3600147056. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:34:12Z), 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/QZNJY2430209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4850c3dd6c4d86de73eaccb4d43eb93c78a259b26ede3033471b728192b02b36. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ42081573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb50d8ea5991f1bcb3d22efa170b2b6e6af68683985aabfa045a435843054c2c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ42081575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4925e38b1dbf3e204f70a41a625e92e4b288c484ee9766a07dc21b00d7f1a8. 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/QZNJY2430037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f05647f0cd47247656d72774d127d357d4585acc6cabe9d11ba816704a558a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNJY2430005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b5c7580dad52372eab7b88f3a41bfdd32ee03ee7750cc619c0ed167108e6ec. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNJY2430355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835350dd351b9c37398b9089e6c88375e7fc3cc7c368f6c4631723aa5508363. 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/QZFZ42081580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a02a48650e93f40ea717b11520ed3e2343fbdd07dc9b29094e111f9e241625. 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/QZNJW2488288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b566226316d02b718099f3bad473aafaa87c8a1ae3c5fee7e7ca590e91ea3. 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/QZNJY2444014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b5c7580dad52372eab7b88f3a41bfdd32ee03ee7750cc619c0ed167108e6ec. 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/QZNJY2430355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ae96575aa4808b10f87db6e81c7a286e5ae2ecf1574fee906649b0c0163b10. 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/USDY42189521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1166d6910ffa78ceae5ae1eb7da5e0c940ddcfb5a2bd7cf859eddb1fb01825a. 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/PEZM92101778.