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 0x0ce99eb22039137a0b245b8dcb1017933cde2c53884ae54f8ca0a03751c91ab5. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9343311b-0f42-4aa3-8568-93ca04a25c4b.json and https://artists.proofprofile.net/proofs/artist/9343311b-0f42-4aa3-8568-93ca04a25c4b.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 0x628a0e691c9ff1d5cd288cf4f9d58d17f08ba23634a4390c2704535ad7e4fdd2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZDQH2435585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3535326939dc70351d03b504da916a1b7104229b103923c104a632c6b363d13. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:22Z), 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/QZDQH2435588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d912862237760dba4f7e9d3c594eca23156f341b46483d74f770bd742c06709. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDQH2435591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c528c762235165969fecf2915344b057cb944e12576703f6ebdfc42d5bd831. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:34:36Z), 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/QZDQH2435592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9e1c6aa33cb5c2f0a483925a6731d7ce2572e529ae62c292efaa1084cec809. 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/US3DF2560969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b2bf603b4f1bf98c945d915da50ebed7d4f853376a4996cca3121dc01acb1f. 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/USANG2523005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92e48b6d0d42b167c29ad1f096d8e16e25f1f87bd1c5beecdc382396a3d8a47. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT6ED2583981.