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 0x579ed58b941d94ecba14352fdc18f0a42f719f8891ff33b5abdcd374a39a899f. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6a3f230-76ea-499e-bf27-585bc8c67f8c.json and https://artists.proofprofile.net/proofs/artist/c6a3f230-76ea-499e-bf27-585bc8c67f8c.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 0xe905cde39e1ccadee6d36f747f76c2399041c9aceaea8832e3e28312e8d89ae4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92496213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bbb0d078f9ae505dc41896b98b154aacc3acfa15033b8896d141a7f2ac0268. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:21:59Z), 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/USCGJ2556106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d3d09db338c53867ff65768b1a1d3cab8fd7bcd4a0b15696e22a14814976df. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USDY42536641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120070405f125eaf1162da6a4276215418d7ac18b5873702e364cf6ba15d6ce4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:11:35Z), 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/USHM22548320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e3aa25d7687635301d7c4f7c0cfdbc00919ee63abe3621ce1db6318ae17f54. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:33Z), 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/USHM92496215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94580096eb0d0905eeea06637fa84f42d27a397091cda2f2e25e14c1cb86179f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:52Z), 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/USHM22548322.