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 0x38f69e39c163299157ac3a427730082503c6865f20108dfd9dfdfbd7eb4a2912. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0468970-0591-4cd6-9c17-9677fd9a69e0.json and https://artists.proofprofile.net/proofs/artist/e0468970-0591-4cd6-9c17-9677fd9a69e0.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 0xb5df127d372007c1d8e5822675484cbe9c3a64c8a74178d382bcc617658f9f30. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFMF1544881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce210f4eef1f6fccc6ef586dafd82bad65dcfb86c04712b1b992dd0d79d06235. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QMFMF1544884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebc689226bc7f08fdc658c1b6c2fb1fc06148148da25352f0958702cdd77e50. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFMF1544886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e989d15e15496039eeb6650d4b63b8bd333437747b37e7a811e01422847570f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:00Z), 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/QMFMF1544888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c580eb6b4c1bd19eb40e38e39d7bbeacd3dc9a0f46b17c9ae8f4165f4c9827d. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T03:24:35Z), 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/QMFMF1544890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fb4ed8dcb07f5831ede226404cbff0daecb78036eb0d9b13fde40217d885ef. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T03:25:13Z), 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/QMFMF1544891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe0b7c7a89cd16c7ddcf4cfccda395fe34cab2004f4fdfb2369ba290a986a87. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMFMF1544892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcd01897fb5a015c6af41eec5c09e3d0faac6214912a67f94f316682a15a858. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMFMF1544893.