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 0xd3901219de29fda4b6b2c8bb861f90f0124063aa91e409273d0da10e69b8b215. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56f8eb4e-99a8-43b7-8e18-c2a46fd20ac4.json and https://artists.proofprofile.net/proofs/artist/56f8eb4e-99a8-43b7-8e18-c2a46fd20ac4.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 0xf4ba1890a022961c7f7813ad149ee9f028190b742fc964b84bfcb57639e56bb3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:34:12Z), 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/QZK6H2234732.
Hang Loose! I Got Dem Ol' Surfer Bloos...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de45fb11a09ca985713238279139eb5953d0525a21396a63ac48669e0259a1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6H2551222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a30c6a7659457f58f933f6d14ec6db973eb7fc35d09a25c9ddd867ad8d66c2. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6H2551225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7965b8d36f29e4ddfb7cc8db3c1f8bff013e8cdd55d70e857c99c0b0826e67c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6H2551227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6419c5570409674b4cef0705c0ec270a077462c2a6df843e64c3dff7b36455b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6H2551228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db53af5cbb4675590987e14d24f60d2c0549371957de638666b44c73e611305. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:33Z), 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/QZK6H2551229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aff612f4749e83fffe4d420925102c36001793a99a55ed4f68c956d05a3ff4b. 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/QZK6H2551230.