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 0x9f7253ec3413e77500c7c12eeb3d2323da265121e963950ad116cc79842dd158. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f756b53f-4d2b-4b11-8655-ea2c937b2ece.json and https://artists.proofprofile.net/proofs/artist/f756b53f-4d2b-4b11-8655-ea2c937b2ece.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 0x5489276832b358b25361aa5fbc72086a231a10be957bf99f44d0436975004eeb. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/GX8MV2501706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14b2322bcf7d3b40d22bc7e6303456b15ce640d5bcf99da26b9505eaa413d1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GX8MV2502053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb0471aaebcb0cd60fd2fba743bc43ffb6d9fb3d91107170d6eab1ab5b2748. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GX8MV2502057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1128564dd93b8abe5a27b84b1c6ab934657ac7e6f62ed9e5f323bbcc24ada1c4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX8MV2502061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f1178ab4cfa264df0e43726c7c7d7778410a82bb2c84f7058fb6dd121a0681. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:05:07Z), 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/GX8MV2502055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6087d2eb111d6a6b270b51a3267ba4b675ccfcf55985cedbca6c2f4c29bb5d0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX8MV2502056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaa22792cd8fc822e3d51da40a6ff49e689151d4c01f34673efdcc6e709893b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GX8MV2502059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735c646723472d8764d4f68b42c2771f96539c5aaa2d3018ef72b720237451a9. 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/GX8MV2502058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173a7347c6b204fc29e8332b42a70b401e58fd6d27b348fd5664a878b14797c3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX8MV2502060.