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 0x05720040aaf9d581c2ad81bad68f9cad0e3461563b23c88b6ff78d740da11d37. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccc54037-c3ce-4e3d-bd5c-c6f8baf9ab31.json and https://artists.proofprofile.net/proofs/artist/ccc54037-c3ce-4e3d-bd5c-c6f8baf9ab31.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 0x54ea48bad8469847fdd1ad2b6e90690cc0f0d79254b91d46e1796cd76b5bc1e8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:18Z), 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/QZNWZ2405363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525ccc8573a6eb323fd4b556f419704ce6c32680e8ef3b16d1fa8bd7c63ed11a. 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/QZNWZ2405365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf429c52174cd57506192c97514a153eb7515e824a3bc19a7f10b5fbaa2357b6. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZNWZ2405367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7a488d58c4699d9a6d8c134d28ddf41f4f70e1d43266da6571b97e8b15d09e. 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/QZNWZ2405368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afff5658aa0cddecc277d2809799f41f3b818a5d3488551fbf35a9e250edc56. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:20Z), 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/QZNWZ2405369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80e144f246cad577d01ad8897478263b9cb1fd8a94066a79106d77d2c43073f. 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/QZNWZ2405370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc30e3567caf0250e64a980ab19410b6820d5482141c9fb4bb7281ad1206dee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:54Z), 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/QZNWZ2405371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6e68860c1c94a6014d06d36fbd58a30f12f54fb425cb80820a2b4512e7711c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:07Z), 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/QZNWZ2405372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73b1a680ff46c84b2c315864e37d7736331422019c64bfb432e1d9405397f1d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWZ2405373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cbf805a27381a1278d7e9d03ed6e581ddd4ce8a93b4b56dc38ebc10ad82ea1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:47Z), 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/QZTB52584750.