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 0x54b72a3ec97874d65fe3542bba6cebc603bd86254ceafd6a4ff45d06ba03144c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e90f427f-f29f-4498-a2fa-feef46229035.json and https://artists.proofprofile.net/proofs/artist/e90f427f-f29f-4498-a2fa-feef46229035.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 0xa2a2619b9c26ea094a2168397ca7ce5b8c2e21582a9c261efe316f0e19e71e6c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BGA671655904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ea624f737726e718e3d6591f32c0deb3cf7ebf94e02a1aacf3d80bbe9a414. 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/BGA671655909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a7192697704bc2385bd4c64ebf107f322356c9d36c2579dee290795e2edcc6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BGA671655912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41367ed791a553b918080c1cbc5429bb2380254ff6e232f5b2daf6a337476540. 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/BGA671655913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a49c17e33c57fa1aab93904493fc3c388cb480dcf6188deaa8b2221218764. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:21:46Z), 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/BGA261576632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d9bbfd1ccf84688d2492c71754d88b844d0e36340fecb3bb26f2fa37365cd8. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:53Z), 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/BGA671656001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8950b9bb08f4197d3c988987f7038e020a855e34223483eb79031490db8e05f. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/BGA261576636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f434db45b17eefa65605a3e21637293eee37e9f51cb3a26653986608559e3a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:01:11Z), 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/BGA261576637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3304e0355cf29959ba9eab1790f1f01e70392c855c6b659877163f6d67e2adff. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BGA261583037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e90f6d744de1d81532c021bb76e2eecc71fd09fb73452132820c440da30a1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:23Z), 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/BGA262478101.