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 0x6a6145c504bb95714d64161f23e0bdb2181cb0b87add575b19c5d59f61623e1d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/683d0e06-49a4-41b3-a5e9-ea19ee63c8af.json and https://artists.proofprofile.net/proofs/artist/683d0e06-49a4-41b3-a5e9-ea19ee63c8af.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 0x2d11a8a3ba71797c0d8eafab8ad0d7ecabd65144ce4ded7bfc01b459bd57074e. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZFZ72415055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a139a86716fcb95206387ef11b8184f2c77852d1109a8f27648830b22094b9e. 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/QZFZ72415057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e9f72b38038351edbec83e7b0e1f3df685f0e2f955d6a999ffb87b1dd4bfa1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:17:50Z), 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/QZFZ72415058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6e4432f7d5da720105f24034a38dcf0a9feeb526ce386c250f9c79aaaf1722. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72415060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e77c089ea7afa4da87099b12bb104c8d48e8dc633569a8c0ad30be9879fb43. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ72415062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeccc84f70a3e600fbfe7735843360a009232dda45a6c9f7f71ff59ae3c943eb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ72415063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12098376384bd0a99c5dcb29e7cd1b0d2b9d316341f739e568b3e447e30901ed. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6Q2473963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebacdf8673b6056c4a4316314e0bb90045ace892002793258007b006cb74c0e6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6Q2473964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c4e326b67d4140d3d5f0d6ac1b5dd67144fe43738ec049fc4f49771183942d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:55Z), 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/QZK6Q2473966.