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 0x48e23998ae8479489fb1e998d64653ae4f87207cad47844d27f66e283cfa5669. 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/bfeb8ec8-931a-4e64-abc7-e076c46a5849.json and https://artists.proofprofile.net/proofs/artist/bfeb8ec8-931a-4e64-abc7-e076c46a5849.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 0x25282865f3a9b0fc01a2f58e73c8efd336a90f5a06e719560d502acb81c35b4a. 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/QZTRX2245754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf593ab3e04b21bc94dbed71cebebd67f1b0790c8ae5aeb11c073f354bb77bb5e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTRX2262956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acffbc32875d69a058a28f1e564ab4dde012c3b1fdf4c2bd074e7d824883af9. 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/QZWDE2245133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a682f899f3841e6b911da66a108b65cd28f4f75d8465a56d4e3cbb6f952195d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USLZJ2338817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefd2fddd18bbda70c532b67c1b80c6f6fde476114086f5f96eda168343d214c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBWUL2304587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eac3d7e49f2adb576d1209b9b195fbb18ace00082665466ecec3416f182774. 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/GBWUL2318207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ce548ee2ffd1dce86e22039a2079783ed9e62c1653e3e8e2b2aadd0433b535. 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/QZWDE2384067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53aec4c7c6be9513cbe5ead317f7199e2ab9bf16289cbff53483d16c6e02d1d. 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/QZZ8B2330111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8d2f0177a7a833d1414974a239f0f1444d6245ce985ce4a8d0d8e1f838ee38. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:42Z), 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/USLZJ2465259.