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 0x98d485c98962d1579088effd262cc6e0900357ba78334346b8e181628f949814. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcb947c6-c7c4-4679-84f9-dabbc31036b8.json and https://artists.proofprofile.net/proofs/artist/fcb947c6-c7c4-4679-84f9-dabbc31036b8.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 0xea00eeff0db831b22e2c515857f2f3dd36e949b88dfcb6addf0e4b00f4a0cd25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BC1C22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863ac5ea39bf15bfeaa0bacfffb69630376a0f4bd33fa6b62ab36c1be4762d50. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC1C22100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cca5e7beb885cb742767a41dd10e3aca3fae1f4d7b261b9b9186483a258b360. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BC1C22100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26318bdc8921ba4bfb63186c1dd3c3bc7742262cba9c6bdda0669d8abf4e093c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:02Z), 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/BC1C22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a6837641a9a3e4ebc3e3979775a4c2232dc9c21efabdcc93c01469fbf653e4. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:01:32Z), 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/BX44O2404617.