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 0x808e1c249adb0ef5548099ff3afb64bd0cc9154202c863f324be8a7029e85ea0. 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/24ce1e6b-6f69-4ebf-85fc-9d0cb6bb6876.json and https://artists.proofprofile.net/proofs/artist/24ce1e6b-6f69-4ebf-85fc-9d0cb6bb6876.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 0xfa0909c262b67851df1c99fe358da14d8ddb35490267ae97bc78202e42bec272. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM3DF2208487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96746e22e0041d96fb3555206eadab1158013a0723c0a1f5c4000e67fd3dd47. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QMANG2218947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d03e3b903553fa39b80be4a7abaef5c8a7a80a53faa0df82adee224e7611f2c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2405060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe997d2b4e67ab440da0bf8da7651cd5809e760dc3c2df0abb04436a4b497430d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR10S2405491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158af2df295decaf018a2175972f93d3ad6e0d2a2d222a50a0f0b3b7fa42befa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S2405494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff8e19ad8a4d71440764131396a43d54cce4499abc57f78821568ab562e5542. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:19Z), 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/DGA0R2443460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cbdaae1cfd262a4d8ba727752e6ca224e60cd00c63f1fbae562ca19471f3cf. 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/FRX872567520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f061da26b9d0340c89c9e3f40d8ad6c1bb92b1a7fb04ea9316ec93d4b2d636. 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/USANG2524309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198d6404223e97e0ebcc0ca58d27e9a6c5007ea8c33f3cd6e4986a65ac47b48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2411718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3607fcd62f7759df335db730b4dd68fe2dbc5d8b7de1b75a01a9918df16473ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2411719.