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 0x5822fc262c13304882bfae852503b6d4ec9fb026a3011c41bee5a738381e4ff1. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6668b05-6beb-461e-9fb6-c14de2e04321.json and https://artists.proofprofile.net/proofs/artist/d6668b05-6beb-461e-9fb6-c14de2e04321.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 0x083ec64ba3d6a811a58be2fe8149a8e11bd138acd9c6502208f2e6e5f9e791a4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:24Z), 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/GBKQU2444951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe004bb4ac8e32cfc485c525eb1218461b2714f82e57ad46f331d2c4e7ee04df4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:05Z), 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/GBKQU2444952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a726846b112ccd45d21d563a71c400860e1457d487ee8447024f89ba6bffb1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:03:14Z), 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/GBKQU2444953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf7a445acdcbaaf25491cdba0085209142c2c688b84486be690e95c4ba5ed3b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:52:59Z), 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/GBKQU2444954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a43138e16ee4021cc703f0e9918900b7d0b15e1f836896943649843f006519b. 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/GBKQU2444955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f05bfe95d31f21e5f8ec8841db8730f70b3794db8b0b95c8394ed5007ca4e9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FXQ662500030.