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 0xecb5f131a44f5509d045ef4ebb23180557eb2dd4e7977ae8e34b80c08308df60. 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/92b76aac-08d4-428a-bdf2-69635edce1b8.json and https://artists.proofprofile.net/proofs/artist/92b76aac-08d4-428a-bdf2-69635edce1b8.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 0x73b9d65520f9f86cfc9733174760f113c1be2051045487eb2122035fa7717587. 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/QZWFL2306316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b8c44e2542713a72c7b0998dd35c675fb01c69d7557f97c1805225444ec3bc. 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/QZES72481573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f842bad001add0e9cb979d8ba7c5e4fbe7ca79e2f3f023a19ba2a284705ec. 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/QZHN42465750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a7d94d168239a0f001585a389be8f81b3cc8963a3036b662810b8e455f5f25. 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/QZHN72413902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef57ac9b422e2cee678657a95c4c85570d615f05857d7f3c66035e8ea24daa05. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6N2492406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc00a0438015db3cb11608ff6875859224296b06ca6a1867290488f8c06f1a. 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/QZK6F2464238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e8a168ca380ab6742ca814fd7dccdf7f7181993698a33875f61ccf695b9c28. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:50Z), 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/QZNWR2489906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e81ab4ac42685fa63d48c8e4b648025de059105611002aee9ae5a3dfaaad7f2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:20Z), 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/QZNWZ2414347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3b3af29073629cf02b9700d9f813bf2b2d18fbdf3969ba08362c6d5564866a. 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/QZPLR2463099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3026a14a5ef9e00b908c8219614885e004b17a256e5534efd231e15354c83531. 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/QZTAS2430106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa39b1424874b78cd9a92a7b4fece14ce1309368211e02acbca77c2c55dcfb7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ7N2401418.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4638f6cdde305d7d17db2a6b57a9fc3cffd0749f1b82b20cde1255f66e1b97c5. 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/QZHN72558173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f8aba458f25c89aa83cd695e42cfde878315709056db69f8b3ef24cf4e3a5. 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/QZWFT2580950.