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 0xc2ab55628da9147e46b2518b9596523f17f174a146182c34d9b5b361660b95f9. 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/3cbcd14b-dc4b-42fb-b5e0-c1a0bbab3a5e.json and https://artists.proofprofile.net/proofs/artist/3cbcd14b-dc4b-42fb-b5e0-c1a0bbab3a5e.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 0x5d276e05b6e79898cf283db7a40e960b65218014299cc9412fc70c402b8cede9. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/QZMEN2030915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67157fa85e81568dc4e71c2ba068c59b2b379227732230363de4848b271f0406. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZFZ62379538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49f6a20d7ae3149365cf318a371b2a8a87f534b2f757c46daa5c28ab021094. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/AUMEV2423536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f1c77674cd5efb30bc4f6a228d894bb99229f4811bae5363686bdf300111bf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2414863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae97ea37bd06483205b9fc6d89aaab0eb71d2606a51c8ad6e8c7539a85ad687b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUGBT2414864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd128423351228bd1c1d3e507198a92859f6c1b8b80d207d0b2622c2e4a83a7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:44Z), 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/AUGBT2479441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9dc038ccaa3523d93a4c8b201f320da72f72437965fabeb46d64928e78351. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:04Z), 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/AUMEV2513733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe467f69e2f1a08367ef2fd8002ef304e5f94b6a14f2234e43767ef6b6cb08528. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUMEV2563413.