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 0x5821c9d520c5812527c35549e88d0b23750ed1c170384b9925c687110cbbc9cf. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6874d511-80d6-4050-9aee-9bfa45b72b30.json and https://artists.proofprofile.net/proofs/artist/6874d511-80d6-4050-9aee-9bfa45b72b30.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 0xeb4f2890f5690917d66a02ac62ee050dad7ed69f93a99bdf50288b77733adb80. 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/TCAGD2233878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5038e3a99d97032cf8da7231c990808c647b9dc726ce5daa023b1edbe0f205. 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/TCAGD2234286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbd27d05d6f8c065497ad76c0fd409048fb3c3d52606365bdb10f126a803cdf. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:29:44Z), 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/TCAEO1946768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26c389ba609211761ecd60c26f22ef785c6a85aa02f5679b6c24199b0bc8864. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:12Z), 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/TCAER2090873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee208a2cf9e5ced14ac39c686be1f7cc9bfcadec639377a637c1f97103e710. 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/TCAET2051656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfb7d706ef0f19a68885c86e544ac4863a72cadd6cec811066d66b6bca98bda. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAIP2430396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937240c3181e94d288122a57d568eb880c660f591f52ee7edfdfdd1e60152d31. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN52537041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6e333067944c7a915707665ea2633ec8a7c82dc4d3ed36ac2538b39b37bfea. 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/QZTAY2555177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a4724fbf93d4c500138340d27a598fe81053729624939beb8e375e5719b0a1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:31Z), 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/QZWFG2569882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d283f54567e288c22fee34149f12894e5ac303f791e4792c3450f0df10ea950. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFX2544614.