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 0x74f950b8a93aed397b33a537bd7eab3581fbf1be370631e5900f35bbd59d81ce. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b22401b-a59a-42e9-89a0-b020a055d16a.json and https://artists.proofprofile.net/proofs/artist/2b22401b-a59a-42e9-89a0-b020a055d16a.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 0x60345a91d9480921d6b75e2a85a87129020ee3798ab8e29cb60ac2292c23c436. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMPKX1886307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fae0e4d1543f60e0dfa90b2a29b5b3c718f00cac827e6621315e9c1492044f. 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/QZES81872194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf59ee569433096d4d8018e1138c07eee566255ebb8a777240a8583d7ba119dd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ21958374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8612eb8d515ae8a6b6111f7408da77e4d16ceea5fa37d341d4ec7b133fc24bf4. 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/QZES82244942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a14229b1f8d5dbe35824bc118abd1817903bb52db7008a32901c79406c5f4d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:08:11Z), 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/QZTB72282768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf16166e528a6f333dd9fa387b342082957e5b5d3b53e1cf6b347eae3d785e37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ72471695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6451a227d697445696ce5f709b7e6a08af99c5fb4f563b7584dc4f22dbb6c16. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZHN32489768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0334515f5d4610b47fbb66bce16c7ffde93968c4aa439fe335085cf711ad3e79. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:55:34Z), 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/QZFYX2579644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feb406ce6edf219ad8d76c471fef04c74f90a7233791078d204eb336b5fd4d2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEP2569996.