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 0x9cd1799f451b6ca162dac67e88007e9e94854b2826e37b6946541fed8ad78397. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8776dc78-1b78-46f2-b8a9-73d8c31d821a.json and https://artists.proofprofile.net/proofs/artist/8776dc78-1b78-46f2-b8a9-73d8c31d821a.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 0xea73a250e3e056a8dd97c2882c1c7fd0e9126c481af3a6537ba70310eaf363e8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FR6V80194417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c556f998be82760ea05637617d2008e1fc9898bb3587cf75399e108a4b2a37. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:25Z), 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/FR6V80194418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce6f490757ac02f0f36cf4114428d9c7fcded4bb814193a8aa6921d501041e1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:11Z), 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/FR6V80194419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39bb91c795d68860d17feb73bc684a8ae5743ed218f0770d8a9c8419044aaf8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR6V80194420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d010c3a29a39db2d5117562955d4ce24ab72a6a09cbc7b10367591b355ae03. 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/FR6V80194421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25983b0ed6bfe4db3253ca4c747fd49e308508372194876bd041cea2b4fec648. 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/FR6V80194422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6077309bbff3720618ccc6b240e2e9bb7cfc12a1562c8078266786311cb9f2fb. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:01Z), 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/FR6V80194426.