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 0x3c582257b27271af84a97300762cd1fe5a77ede3228bcdda90a58e643fcdaedc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cde45b75-29e8-47ae-9263-4fbd4422f103.json and https://artists.proofprofile.net/proofs/artist/cde45b75-29e8-47ae-9263-4fbd4422f103.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 0xfc4535d380d21cd327e79513a1d650fa3a17da3b1e7464e1f3fc3beab604657d. 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/USA2P2404911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4535d380d21cd327e79513a1d650fa3a17da3b1e7464e1f3fc3beab604657d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA2P2404911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d79c5a9a2c7d9d8cc373f94bb2d48e6c4534f3175bfd454e4ebb135e5e157e. 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/DEH742404698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5823632fbb56e3ca35abbfa9a628cd74d3fefbb65f8d8ca24db963f6877a13. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USA2P2413087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a1ce8baaeabf9d55f7e5cecf2571787baa2f6a8a77b395395c09a9adfd3386. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:53:13Z), 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/USA2P2423359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e3ba3a75bf2a4e8a85d980cbd3e1ee0323358178b11b13ad2100719ee6398. 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/USA2P2460486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e3ba3a75bf2a4e8a85d980cbd3e1ee0323358178b11b13ad2100719ee6398. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:47Z), 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/USA2P2460486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3ede5e8c7a10565bb502a62aaa045bbcef8f1b79f3ca4299203db0043ea67. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:51:32Z), 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/USA2P2502021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3ede5e8c7a10565bb502a62aaa045bbcef8f1b79f3ca4299203db0043ea67. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:39Z), 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/USA2P2502021.