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 0xe7a8fcdccafc318e24057e17d176dbd5c9427c482549cd900c8229f59714f68a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eb23ed4-a6ba-4388-acc4-258d89526a71.json and https://artists.proofprofile.net/proofs/artist/4eb23ed4-a6ba-4388-acc4-258d89526a71.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 0x8ef7b066890c994bac3e33ea139bf7f990607f9d13bc4d5771587cf253c56a99. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZNWR2453019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915a20d7c844c6debcafc40872e514da86b1d97bb09f1c98a07de517e7bebdba. 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/QZNWX2474073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1a4d46e86be422efe474323ca4dfe4377d5aab3807e5a9a37247949a74a48. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:16:43Z), 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/QZPLR2414096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a5d9ac447f28b5601ea33377bd8edccfad1c0f6fa518a7831b2810e691201a. 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/QZTAS2401619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e115b9af59e89fbdbb1c87ed1f3f9e0ad0f65c2b857da84b4ae384056c34a54. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:23Z), 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/QZTAU2465543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e1a25dfe7b1cba9463890eec96359b97470bb11fd0d2e6fc337fd0976d9859. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB22429763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac47fc12a7e75b729302e8d0485dcd2b77a0877dda719564124a3d09dffa9f7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZZ772465568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659b7177380baa480540f28acf705d8d08f2ab820f5889d2f38817cc9ede10ba. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7Q2405845.