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 0xa7c87fc830b9cdc6a7de93c69fb19578b4a10e4ea1f1beb4ab05ed4739e3cd72. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b96e15d5-da7e-45c0-bdf0-d4b66d855e7f.json and https://artists.proofprofile.net/proofs/artist/b96e15d5-da7e-45c0-bdf0-d4b66d855e7f.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 0x374be7aa323db069361889afdbab655fe280e228dfb98953abdcbcb4a1e79d3d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNWT2301168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbf94ff6245bdfe21eb0451a0c6eb410bc467a61f31669bdf27938abf284ef3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ22406230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918c10c3f124df7fc6e83f90d83da115a845acdaa90ffae72b33221f4512cd45. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:43:58Z), 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/QZFZ42470697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7603d326018ca8c6d91c8eff6a2e0bae97149595dfd48ae1dbf773964c6970f7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52470175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b1c18796e0f7a655e879ec4fd05ae2a935c000766bf55119df6b49f835711f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:33:12Z), 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/QZTB72461382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d30ece88059f733f9db4920b83220def2f12824c457029df04a22611007edc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:25:11Z), 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/QZTBB2495180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62218c0d7a0f30198de77abb9abf03cf3bca98ccfee96b6f5bdd87b500453b7c. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZZ7U2414448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666f59f017f1da269390819237e833397c34055445f00ea37788f4ad5b7e88c4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:57Z), 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/QZZ7T2475606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc3993474aa9a472f986252430ca5774ccf7c1f9bc2ecfe772283f22812fd7a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN42553607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb8f3826b1c0a7864fae45029d28cb5f6cfde709b6e0989e514a6d1b4eaeba3. 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/QZNWZ2554762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449a6b75582d6d57d2abe5ae670732e510f57aea00f09636d45a0c9c5ffc2f9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ762575918.