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 0xcb6de122f09c7406a6660ca2f169b84b36da490462453d64e19a857326f9bf02. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd46e55b-0292-4adc-8744-0c13687f6c2c.json and https://artists.proofprofile.net/proofs/artist/fd46e55b-0292-4adc-8744-0c13687f6c2c.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 0x174c81fe5dcb88c5a97770cdc8a64fa4a5293a22633ccad34846c1672eff0228. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:08:50Z), 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/TCAEG1980021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d16580a8fecca8d0274d753de8cc8e4b6d0217c48f2815ea0514fc9601f14e1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USLD91724984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe204264ca20cdb84b89ba937fb1ccb2e32ec3dc67b5a77088dd5785a235d325f. 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/CA5KR2129045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875dfa2c4925d5d561d82ba7675a57a2ef925a5eb47177c96042fc168d9ba2af. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN72202084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d7a7e46497d7caded0f15aaef3676ba8d1615be9dd0c44a649828f1c22b2ba. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:22Z), 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/CH6542242203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049218c0344598f20032ed6a2e89d6974ffe4469f7ca4fe616898096d9684988. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:02:34Z), 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/QZTB42437980.