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 0x6c64b9fc7d4e0589478b36516643d87387c4b38cea554a9bad34dfdd5e1d28a2. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dacb01cc-976e-4bf7-9a70-bd80a1247112.json and https://artists.proofprofile.net/proofs/artist/dacb01cc-976e-4bf7-9a70-bd80a1247112.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 0x413558cc898b78dcb42e1b35271f831ff7ef5253ed61c206a70de60746bde26f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:25:34Z), 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/FIHUG1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3b0f266e43ae1ffceceaa9f2d3e7d124ce1a51705b3227702291a4c4582040. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:05:58Z), 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/FIHUG1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4be62b37b05e6c5dcd346a5aefd1b182927a278b4d9c1bdf6343dab733f08f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:04Z), 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/FIHUG1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4025515af8f4a898cde5cfa37140ab8c8e7a8136abd4961ef447d6c6624fdd1. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/FIMRR1200077.