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 0x5b56b2b5c32f7f6623d5daf01309c6ca5e60e4e459f84254ea69c69fbf222eaf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1f28fe2-d026-4ee4-abe9-050ceaaf9cd0.json and https://artists.proofprofile.net/proofs/artist/d1f28fe2-d026-4ee4-abe9-050ceaaf9cd0.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 0xd075777fafa9d225af54e679da0bf328cad8fb07145797a117df44900d935862. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES51912949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c27d07cbac2b296efe71252292f24426d5617d324d69f60ad992060390ba81. 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/ARY4P2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a1b150f488f1ea9716e817ab20e899cb792d82b19dfac6905eb5f572bcbdf8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:54:03Z), 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/QZTVM2440759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1a2b847335eb452f2bac95caecd73d01ecb6228d1b2c84f6d5e513cc3221dd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:19:10Z), 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/QZTAZ2543950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d830db5784232793a0d2104fabe24750d2f83ed9f98d55faa973bd0f56c0b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTAZ2595778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1d934e2ebecc50b56def208dca225c0ce8e32bb24324aa3d939ca3f92dca34. 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/QZTB62578638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871ee9a55d2d152de9636a56a80537c768c5914c0c6f966ad6f017d6105f0cdb. 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/QZTBA2574009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bdb89a536b4ee1f44e4a2c167457bfd44c8268fb8e17a57bd4e5045cde3f51. 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/QZTBB2550043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286113fd1c2e67f84de15877a0df97efef8365dc84cbbb428343f969a87edd2c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:58:03Z), 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/QZWFQ2509873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826fa3491f2f8ea673eaf40b91b35dfb81ca6c7ea4153e2a7380c85a15fd3dfc. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZZ7V2587864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aefc5669db64604c4fa960202ef9dc40fb2f3acf54e89eacff53d66fb7fa9c. 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/QT6E52558320.