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 0xc01a179d2eae72bf7d38a1ee20728e4899f63bd46424b4597e29b8a9c27bebd6. 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/ef2c5c9f-149d-46bb-b2d5-823fa621d63b.json and https://artists.proofprofile.net/proofs/artist/ef2c5c9f-149d-46bb-b2d5-823fa621d63b.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 0x258601436720216fde2396212205451d05958e0d3d252c3ec69e3153304a5288. 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/UKR6V2256221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3efcfc75a02bb3b8c80cd4b974b99692438e23fb4ede13e8e4e7eb611cdb3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0R2489811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b6b4efb9d074acc95205c976e30584e235dc1fa359d2e1500dd6d6b259fc66. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:44Z), 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/DGA0R2489813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c1f3be233f1d2a30300e63ba170f139b1bd6683d8950c9576f048f94421cd3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GXBNP2499203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b32d389cc31d7bb96fd017a964da0c921a82f6a97ea2ab2ce2661f48485d07c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:02Z), 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/GXBNP2499214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e9f08b9bda095cd25bdb303aa784ac1de22b9286d1e3890977ff024d637315. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXBNP2526248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af4df27d2f5d5db051ec0bbd7ae0b03b260313a127034d947e04da93456e09f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUAGT2544808.