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 0xc7d2d9747e191381feb3465921c116d827f35ae50ea9915aa0eaa49a8827868d. 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/12f38528-2b26-4f62-8067-31788026b23b.json and https://artists.proofprofile.net/proofs/artist/12f38528-2b26-4f62-8067-31788026b23b.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 0xa31e35bec392faa25fe8c1f79eece064699379430c9d6698f1fe124fd566eac4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHN62046388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b33e5b6161801f2542c6f49f5c3295d25a2cd81b16e80e55963a1e0f5541391. 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/QZFZ52158522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ccfa25b5e3fd2cd8603192921473c89ffefb5b2ebf1e8cac0c230f7e2b8f68. 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/QZFZ52158524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb8c2501152fd77b5e9118e9f550caaf7cba9816b1bcc98c23ce96e7ea17262. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:20:01Z), 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/QZMER2140019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac0c2b23f162b0766e821bf9d44f64687ac7ab4f29aea1695bc0dc43072bf9a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6P2215468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1e1e1d1661e3e8bf9b071454746ba4b535d8667f965fec9fd03fa554c2441c. 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/DGA062371334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb64e32dbdf6a1e37f6ff7f6c4d9f1ed039576d35e7939aa19f164c6272b4256. 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/FRX282459105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc3d663bbdfb94c58be444e8ab3d5dc328659f7fb696096b3e197d481ffa6ed. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DGA0R2425373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f33b2146886eeae8d4404d5f99946db1771008730135a808ba725759da6f5f6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0R2478434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5420235315b9b900629c47c52a708c89a6ce288aad0e60e537ee422873fb9d79. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:02:19Z), 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/DGA0R2478436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebb7850ef72a2c40b3783e58d4b090139e6bd107cfcdbee8d74af44fe05fb1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:18Z), 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/DGA0R2478437.