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 0xd0e66df6b46bcc85c24a487d72306171a2ed259a8e02d3c7cf8528f262469c20. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96a6aba2-5d0a-4389-8132-1436b14fb1b6.json and https://artists.proofprofile.net/proofs/artist/96a6aba2-5d0a-4389-8132-1436b14fb1b6.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 0x66093f727d5ac982390883a5e28c59eca75739ee57618aeffbc9517b999fc69c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGJ2210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29cb06fdfd4622a7b6a74bbd4e87e819443325bd8a5e3283693904201374173. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6L2473059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652770f863d3536e9efca0ead154f0e7a46d8267937933b0aa8490b19261feb6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:36Z), 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/QZZ8A2536270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95708206c0781f2e12ac3cb927d1e79ecb028bab77cdfabbb061a0d32deac6f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:12:17Z), 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/QZZ8A2536292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3406b7586114090dcf14011b0868eaed151d62e72492855ccf10e0621a8545f2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:12Z), 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/QZZ8A2536310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eac063ef649613068f96a73086c976e861942851e74162a5d1a6fabe5a679aa. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:58:27Z), 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/QZZ8A2536325.